The period of the frequency factor b that is given in the diagram above would be = 0.2 sec.
How to determine the period of the frequency factor b given above?The frequency of a water wave is defined as the number of times the wave completes a cycle within a given period of time. While the period is the time it takes for the completion of a cycle.
The dot the represents the frequency factor b is the green dot on the wave table. Therefore the period as traced from the graph= 0.2 sec.
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A shop gives an offer saying '20% discount on all products and if your bill amount (after the discount) is more than Rs 1000,
then you will get further discount of 20% on the bill amount).
Aditi buys goods worth Rs 2400 by marking price. What is the amount she needs to pay?
Answer:
Step-by-step explanation:
To calculate the amount Aditi needs to pay, we need to apply the discounts step by step based on the given offer.
Step 1: 20% discount on all products
The marked price of the goods is Rs 2400. Applying a 20% discount means she will get a reduction of 20% of the marked price.
20% of Rs 2400 = (20/100) * Rs 2400 = Rs 480
After the first discount, the new bill amount is Rs 2400 - Rs 480 = Rs 1920.
Step 2: Additional 20% discount on the bill amount if it exceeds Rs 1000
The new bill amount after the first discount is Rs 1920. If this amount exceeds Rs 1000, Aditi will get a further discount of 20% on this bill amount.
Since Rs 1920 is greater than Rs 1000, we can apply a 20% discount to it.
20% of Rs 1920 = (20/100) * Rs 1920 = Rs 384
The final amount Aditi needs to pay after both discounts is Rs 1920 - Rs 384 = Rs 1536.
Therefore, Aditi needs to pay Rs 1536.
The graph of the function f(x) = (x + 2)(x + 6) is shown
below.
+2
10
4
2
-2+
4
-6
2
4
6 X
Which statement about the function is true?
The function is positive for all real values of x where
x>-4.
The function is negative for all real values of x where
-6
The function is positive for all real values of x where
x <-6 or x>-3.
The function is negative for all real values of x where
x < -2.
The statement that is true about the function is "The function is negative for all real values of x where x < -2."
To determine the statement that is true about the function f(x) = (x + 2)(x + 6) based on the given graph, we can analyze the behavior of the graph and identify the regions where the function is positive or negative.
Looking at the graph:
The function intersects the x-axis at x = -6 and x = -2.
The graph is below the x-axis between x = -6 and x = -2, and above the x-axis outside of that interval.
From this information, we can conclude that the function is negative for all real values of x where x < -2. This is because the graph is below the x-axis in that region.
Therefore, the statement that is true about the function is:
"The function is negative for all real values of x where x < -2."
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Need help solving the problem, please.
The equation y = -6x + 2 (option c) is parallel to the graph of y = -6x + 3.
Which of the given lines is parallel to y = -6x + 3?The slope-intercept form is expressed as;
y = mx + b
Where m is slope and b is the y-intercept.
Given the equation of the graph in the question:
y = -6x + 3
To determine which of the given options:
a) y = (1/6)x + 3
b) y = -(1/6) + 3
c) y = -6x + 2
d) y = 3x - 6
is parallel to the graph of y = -6x + 3, we need to compare their slopes.
The given equation of the graph is y = -6x + 3:
Slope of the graph is -6.
Now, lets check each option:
a) y = (1/6)x + 3
This equation has a slope of 1/6, which is not equal to -6.
Therefore, it is not parallel to y = -6x + 3.
b) y = -(1/6) + 3
This equation also has a slope of 1/6 (the negative sign doesn't affect the slope), it is not parallel to y = -6x + 3.
c) y = -6x + 2
This equation has a slope of -6, which is the same as the slope of y = -6x + 3. Therefore, it is parallel to the given graph.
d) y = 3x - 6
This equation has a slope of 3, which is not equal to -6. Thus, it is not parallel to y = -6x + 3.
Therefore option C) y = -6x + 2 is the correct answer.
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NO LINKS!! URGENT HELP PLEASE!!
25. Use the relationship in the diagrams below to solve for the given variable.
Justify your solution with a definition or theorem.
Answer:
x = 110°
Step-by-step explanation:
The opposite angles are equal in a parallelogram
3x - 60 = 2x + 50
⇒ 3x - 2x = 60 + 50
⇒ x = 110°
Answer:
x = 110°
Step-by-step explanation:
As the top and bottom line segments of the given shape are the same length and parallel (indicated by the tick marks and arrows), the shape is a parallelogram.
As the opposite angles of a parallelogram are equal, to find the value of the variable x, equate the two angle expressions and solve for x:
[tex]\begin{aligned}3x-60^{\circ}&=2x+50^{\circ}\\3x-60^{\circ}-2x&=2x+50^{\circ}-2x\\x-60^{\circ}&=50^{\circ}\\x-60^{\circ}+60^{\circ}&=50^{\circ}+60^{\circ}\\x&=110^{\circ}\end{aligned}[/tex]
Therefore, the value of x is 110°.
Note: There must be an error in the question. If x = 110°, each angle measures 270°, which is impossible since the sum of the interior angles of a quadrilateral is 360°.
When the sun’s angle of depression is 36 degrees, a building casts a shadow of 44 m. To the nearest meter, how high is the building? Enter a number answer only.
The height of the building is approximately 32 meters.
To determine the height of the building, we can use the tangent function, which relates the angle of depression to the height and the length of the shadow.
Let's denote the height of the building as h.
Given that the angle of depression is 36 degrees and the length of the shadow is 44 m, we can set up the following trigonometric equation:
tan(36°) = h / 44
Now, we can solve for h by multiplying both sides of the equation by 44:
h = 44 * tan(36°)
Using a calculator, we find that tan(36°) is approximately 0.7265.
Substituting the value, we get:
h = 44 * 0.7265
Calculating the value, we find:
h ≈ 32 meters
Consequently, the building stands about 32 metres tall.
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williams has 32 coins that are all either quarter or dimes the coins have a value of $5 how many dimes does williams have
Answer:
20 dimes
Step-by-step explanation:
1 dime = $0.1
1 quarter = $0.25
Let there be x dimes
Then the number of quarters is 32-x
Also, $5 = 0.1x + 0.25(32-x)
⇒ 5 = 0.1x + 8 - 0.25x
⇒ 0.25x - 0.1x = 8 - 5
⇒ 0.15x = 3
⇒ x = 3/0.15
⇒ x = 20
Evaluate |x - y| + 4 if x = -1, y = 3, and z = -4.
Answer:
8
Step-by-step explanation:
Substitute the values in the expression, we have:
[tex]\displaystyle{|-1-3|+4}[/tex]
Evaluate:
[tex]\displaystyle{|-4|+4}[/tex]
Any real numbers in the absolute sign will always be evaluated as positive values. Thus:
[tex]\displaystyle{|-4|+4 = 4+4}\\\\\displaystyle{=8}[/tex]
Hence, the answer is 8. A quick note that z-value is not used due to lack of z-term in the expression.
determine the value of x
Answer:
[tex]x = 5\sqrt3[/tex]
Step-by-step explanation:
We can solve for the side length x in this 30-60-90 triangle by using the ratio of side lengths for that specific type of right triangle:
1 : [tex]\sqrt3[/tex] : 2In this triangle, we can identify the smallest side (corresponding to 1 in the ratio) as 5. This means we can solve for x by multiplying 5 by [tex]\sqrt3[/tex]. Thus:
[tex]\boxed{x = 5\sqrt3}[/tex]
Pls help I am stuck Tysm
Answer:
16cm
Step-by-step explanation:
perimeter for C is 44cm
perimeter for A and B 60cm
60cm-44cm=16cm
Hope this helps
Please answer ASAP I will brainlist
Answer:
Step-by-step explanation:
The given augmented matrix is already in reduced row echelon form. We can interpret it as a system of equations as follows:
1x + 0y + 0z + (4/5)w = 0
0x + 1y + 0z + 5w = 0
0x + 0y + 1z - 4w = 0
0x + 0y + 0z + w = -4
From the last row, we can see that w = -4. Substituting this value back into the previous rows, we get:
1x + 0y + 0z + (4/5)(-4) = 0
0x + 1y + 0z + 5(-4) = 0
0x + 0y + 1z - 4(-4) = 0
Simplifying these equations, we have:
x - (16/5) = 0
y - 20 = 0
z + 16 = 0
From the second equation, y = 20. From the third equation, z = -16. Substituting these values into the first equation, we get x - (16/5) = 0, which implies x = 16/5.
Therefore, the solution of the system is (16/5, 20, -16, -4).
So, the correct choice is:
A. The system has exactly one solution. The solution is
(16/5, 20, -16, -4)
On a coordinate plane, a dashed straight line has a positive slope and goes through (negative 3, negative 7) and (0, 2). Everything to the left of the line is shaded.
Which linear inequality is represented by the graph?
y < 3x + 2
y > 3x + 2
y < One-thirdx + 2
y > One-thirdx + 2
The linear inequality represented by the graph is y < 3x + 2. Option A.
To determine the linear inequality represented by the graph, let's analyze the given information and the slope-intercept form of a linear equation (y = mx + b), where m represents the slope and b represents the y-intercept.
We are given two points on the line: (-3, -7) and (0, 2). Using these points, we can calculate the slope (m) as follows:
m = (y2 - y1) / (x2 - x1)
= (2 - (-7)) / (0 - (-3))
= 9 / 3
= 3
Therefore, the slope of the line is 3.
Next, we can substitute the slope and one of the given points into the slope-intercept form to find the y-intercept (b). Let's use the point (0, 2):
y = mx + b
2 = 3(0) + b
2 = b
So, the y-intercept (b) is 2.
Now we have the equation of the line: y = 3x + 2.
The shaded region is to the left of the line. To express this region as an inequality, we need to find the inequality symbol. Since everything to the left of the line is shaded, we need the inequality to represent values less than the line.
Therefore, the correct inequality is y < 3x + 2.
Hence, the linear inequality represented by the graph is y < 3x + 2. So Option A is correct.
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Note the complete question is
On a coordinate plane, a dashed straight line has a positive slope and goes through (negative 3, negative 7) and (0, 2). Everything to the left of the line is shaded.
Which linear inequality is represented by the graph?
A.) y < 3x + 2
B.) y > 3x + 2
C.) y < 1/3x + 2
D.) y > 1/3x + 2
answer ASAP I will brainlist and i will answer two questions on your page
Using row operations to write the augmented matrix, the value of x, y and z are 2, -12 and 11
What is the solution to the system of equations?To solve the system using row operations, we'll write the augmented matrix and perform row operations to transform it into row-echelon form. Here are the steps:
1. Write the augmented matrix for the system of equations:
[1 1 -1 | 1]
[4 -1 1 | 9]
[1 -3 2 | -14]
2. Perform row operations to transform the matrix into row-echelon form:
R2 = R2 - 4R1
R3 = R3 - R1
[1 1 -1 | 1]
[0 -5 5 | 5]
[0 -4 3 | -15]
3. Perform row operations to further transform the matrix into row-echelon form:
R2 = -R2/5
R3 = -4R2 + R3
[1 1 -1 | 1]
[0 1 -1 | -1]
[0 0 -1 | -11]
4. Perform row operations to obtain a diagonal of 1s from left to right:
R1 = R1 + R3
R2 = R2 + R3
[1 1 0 | -10]
[0 1 0 | -12]
[0 0 -1 | -11]
5. Perform row operations to transform the matrix into reduced row-echelon form:
R3 = -R3
[1 1 0 | -10]
[0 1 0 | -12]
[0 0 1 | 11]
The resulting matrix corresponds to the system of equations:
x + y = -10
y = -12
z = 11
Therefore, the solution to the given system of equations is x = -10 - y, y = -12, and z = 11.
So, the solution is x = -10 - (-12) = 2, y = -12, and z = 11.
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What is the solution to the system of equations graphed below?
A. (0, -1)
OB. (0,1)
OC. (-1,0)
D. (1,0)
S
PRE
y=-x-1
y=x+1
y=x+1
y=-x-1
The point of intersection is (-1, 0). Therefore, the correct answer is C. (-1, 0).
To find the solution to the system of equations graphed below, we need to identify the point where the two lines intersect.
The equations of the lines are:
y = -x - 1
y = x + 1
To find the point of intersection, we can set the two equations equal to each other and solve for x:
-x - 1 = x + 1
Adding x to both sides:
-1 = 2x + 1
Subtracting 1 from both sides:
-2 = 2x
Dividing both sides by 2:
x = -1
Now that we have the x-coordinate, we can substitute this value back into either equation to find the y-coordinate. Let's use the second equation:
y = x + 1
y = -1 + 1
y = 0
Therefore, the point of intersection is (-1, 0).
Among the given options, the closest point to (-1, 0) is option C: (-1, 0).
Therefore, the correct answer is C. (-1, 0).
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Conduct the hypothesis test and provide the test statistic and the critical value, and state the conclusion. A person drilled a hole in a die and filled it with a lead weight, then proceeded to roll it 200 times. Here are the observed frequencies for the outcomes of 1, 2, 3, 4, 5, and 6, respectively: 29, 31, 49, 37, 26, 28. Use a 0.025 significance level to test the claim that the outcomes are not equally likely. Does it appear that the loaded die behaves differently than a fair die?
The loaded die appears to behave differently from a fair die.Based on the chi-square test, the loaded die does not exhibit equal probabilities for each outcome.
To test the claim that the outcomes of the loaded die are not equally likely, we can use the chi-square goodness-of-fit test. The null hypothesis (H₀) assumes that the outcomes are equally likely, while the alternative hypothesis (H₁) assumes that they are not equally likely.
Step 1: Set up hypotheses
H₀: The outcomes of the die are equally likely.
H₁: The outcomes of the die are not equally likely.
Step 2: Select the significance level
The significance level is given as 0.025, which means we have a two-tailed test and an alpha level of 0.025 for each tail.
Step 3: Compute the test statistic
We calculate the chi-square test statistic using the observed frequencies and the expected frequencies assuming equal probabilities for each outcome.
Expected frequencies (fair die):
1: 200/6 = 33.33
2: 200/6 = 33.33
3: 200/6 = 33.33
4: 200/6 = 33.33
5: 200/6 = 33.33
6: 200/6 = 33.33
Applying the chi-square formula, we get the test statistic:
χ² = ∑((observed - expected)² / expected)
Calculating this value, we get χ² ≈ 13.97.
Step 4: Determine the critical value
Since the significance level is 0.025 and the test is two-tailed, we divide the significance level by 2 to find the critical value associated with each tail. With 5 degrees of freedom (6 categories - 1), the critical value is approximately 11.07.
Step 5: Make a decision
The test statistic (13.97) is greater than the critical value (11.07), which leads us to reject the null hypothesis. Thus, we have evidence to suggest that the outcomes of the loaded die are not equally likely.
The loaded die appears to behave differently from a fair die.
In conclusion, based on the chi-square test, the loaded die does not exhibit equal probabilities for each outcome.
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Tyrone places a carton of milk and a box of cookies together. The carton of milk has a length of 6 inches, a width of 4 inches, and a height of 8 inches. The box of cookies has a length of 5 inches, a width of 4 inches, and a height of 2 inches. What is the combined volume of the boxes?
Therefore, the combined volume of the carton of milk and the box of cookies is 232 cubic inches.
To find the combined volume of the carton of milk and the box of cookies, we need to calculate the volume of each object and then add them together.
The volume of an object can be found by multiplying its length, width, and height. Let's calculate the volume for each item:
Carton of milk:
Volume = Length × Width × Height
= 6 inches × 4 inches × 8 inches
= 192 cubic inches
Box of cookies:
Volume = Length × Width × Height
= 5 inches × 4 inches × 2 inches
= 40 cubic inches
Now, we can find the combined volume by adding the volumes of the carton of milk and the box of cookies:
Combined Volume = Volume of Carton of milk + Volume of Box of cookies
= 192 cubic inches + 40 cubic inches
= 232 cubic inches
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Find x intercepts y=(x+3) (6x-2)
Answer:
x = - 3 , x = [tex]\frac{1}{3}[/tex]
Step-by-step explanation:
to find the x- intercepts let y = 0 , that is
(x + 3)(6x - 2) = 0
equate each factor to zero and solve for x
x + 3 = 0 ( subtract 3 from both sides )
x = - 3
6x - 2 = 0 ( add 2 to both sides )
6x = 2 ( divide both sides by 6 )
x = [tex]\frac{2}{6}[/tex] = [tex]\frac{1}{3}[/tex]
the x- intercepts are then x = - 2 and x = [tex]\frac{1}{3}[/tex]
AB=BC
A
60°
ODC
D
AB
374
B
The longest segment shown is
BC
C
Note that the longest segment in the shapes shown is DC (Option B).
How is this so?The longest side of a triangle is opposite to greatest angle.
To determine the longest side in a triangle, compare the lengths of all three sides. The side with the greatest length is the longest side.
You can use a ruler or a measuring tool to measure the lengths of the sides or compare the numerical values if they are provided.
In this case,
∠A = ∠DBA = 60°
So ∠ ABD is an equilateral triangle.
So, AB = BD = AD
Since
AB = BC
Then
∠BDC = ∠C ∠ 38°
so ∠DBC > 90°
This means that DC is the longest side.
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NO LINKS!!! URGENT HELP PLEASE!!!
Please help with 27 & 28
Answer:
27) 34.29 in²
28) If I get an A, then I studied for my final.
Step-by-step explanation:
Question 27To calculate the area of the trapezoid, we need to find its perpendicular height.
As the given diagram shows an isosceles trapezoid (since the non-parallel sides (the legs) are of equal length), we can use Pythagoras Theorem to calculate the perpendicular height.
Identify the right triangle formed by drawing the perpendicular height from the vertex of the bottom base to the top base (this has been done for you in the given diagram).
As the two base angles of an isosceles trapezoid are always congruent, the base of the right triangle is half the difference between the lengths of the parallel bases, which is (8 - 6)/2 = 1 inch.
The hypotenuse of the right triangle is the leg of the trapezoid, which is 5 inches.
Use Pythagoras Theorem to find the perpendicular height (the length of the other leg):
[tex]h^2+1^2=5^2[/tex]
[tex]h^2+1=25[/tex]
[tex]h^2=24[/tex]
[tex]h=\sqrt{24}[/tex]
[tex]h=2\sqrt{6}[/tex]
Now we have found the height of the trapezoid, we can use the following formula to calculate its area:
[tex]\boxed{\begin{minipage}{7 cm}\underline{Area of a trapezoid}\\\\$A=\dfrac{1}{2}(a+b)h$\\\\where:\\ \phantom{ww}$\bullet$ $A$ is the area.\\ \phantom{ww}$\bullet$ $a$ and $b$ are the parallel sides (bases).\\\phantom{ww}$\bullet$ $h$ is the height.\\\end{minipage}}[/tex]
The values to substitute into the area formula are:
a = 8 inb = 6 inh = 2√6 inSubstituting these values into the formula we get:
[tex]A=\dfrac{1}{2}(8+6) \cdot 2\sqrt{6}[/tex]
[tex]A=\dfrac{1}{2}(14) \cdot 2\sqrt{6}[/tex]
[tex]A=7\cdot 2\sqrt{6}[/tex]
[tex]A=14\sqrt{6}[/tex]
[tex]A=34.29\; \sf in^2\;(nearest\;hundredth)[/tex]
Therefore, the area of the isosceles trapezoid is 34.29 in², rounded to the nearest hundredth.
[tex]\hrulefill[/tex]
Question 28Given conditional statement:
"If I studied for my final, then I will get an A"The hypothesis is "I studied for my final", and the conclusion is "I will get an A".
The converse of a conditional statement involves switching the hypothesis ("if" part) and the conclusion ("then" part) of the original statement.
Therefore, the converse of the statement would be:
"If I get an A, then I studied for my final."I am trying to figure out how you would read 2.1 as time would it be hours, minutes, or seconds?
Answer: seconds
Step-by-step explanation:
Do you think the graph given below could be the graph of y=sin x?
The graph in this problem is the graph of y = 2sin(x), not y = x, as it has a amplitude of 2.
How to define a sine function?The standard definition of the sine function is given as follows:
y = Asin(B(x - C)) + D.
For which the parameters are given as follows:
A: amplitude.B: the period is 2π/B.C: phase shift.D: vertical shift.The function in this problem has an amplitude of 2, with no phase shift, no vertical shift and period of 2π, hence it is defined as follows:
y = 2sin(x)
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Solve the proportion for the missing values 5/12 = x/20
Answer:
x = 5
Step-by-step explanation:
We can solve for x in this proportion, or an equation of ratios, by multiplying both sides by 20.
[tex]{/}\!\!\!\!\!{20}\cdot \dfrac{5}{{/}\!\!\!\!\!20}=\dfrac{x}{{/}\!\!\!\!\!20} \cdot {/}\!\!\!\!\!20[/tex]
We can see that the 20s cancel in the numerator and denominator in both sides, and the equation is solved for x:
[tex]x = 5[/tex]
TIME REMAINING
01:48:30
On a coordinate plane, 2 lines are shown. Line H J has points (negative 4, negative 2) and (0, 4). Line F G has points (negative 4, 1) and (0, negative 2).
Which statement best explains the relationship between lines FG and HJ?
They are perpendicular because their slopes are equal.
They are perpendicular because their slopes are negative reciprocals.
They are not perpendicular because their slopes are equal.
They are not perpendicular because their slopes are not negative reciprocals.
Answer:
Its b i bealive
Step-by-step explanation:
Triangles J K L and M N R are shown. In the diagram, KL ≅ NR and JL ≅ MR. What additional information is needed to show ΔJKL ≅ ΔMNR by SAS? ∠J ≅ ∠M ∠L ≅ ∠R ∠K ≅ ∠N ∠R ≅ ∠K
To show that ΔJKL ≅ ΔMNR by SAS (Side-Angle-Side), we need the additional information that the lengths of the corresponding sides JK and MN are equal.
To prove ΔJKL ≅ ΔMNR using the SAS congruence criterion, we need to establish that two corresponding sides and the included angle of the triangles are congruent.
1. Given information:
- KL ≅ NR (corresponding sides)
- JL ≅ MR (corresponding sides)
- ∠J ≅ ∠M (included angle)
- ∠L ≅ ∠R (corresponding angles)
- ∠K ≅ ∠N (corresponding angles)
- ∠R ≅ ∠K (corresponding angles)
2. Additional information needed:
- We need to know if JK ≅ MN (corresponding sides) to establish the SAS congruence criterion.
3. Possible scenarios:
- If JK ≅ MN, then we can establish that ΔJKL ≅ ΔMNR by SAS.
- If JK is not equal to MN, then we cannot apply the SAS congruence criterion, and additional information or a different congruence criterion would be needed to prove the triangles congruent.
In summary, the lengths of the corresponding sides JK and MN need to be equal to prove ΔJKL ≅ ΔMNR by SAS. Without this information, we cannot conclude the congruence of the triangles using the SAS criterion alone.
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In the triangle below, which of the following best describes DH?
A. Angle bisector
B. Altitude
C. Median
D. Perpendicular bisector
Answer:
AStep-by-step explanation:Angle EDH=Angle FDH, so A must be correct.
Also, we don't have more information to prove B, C, D is right
Answer:
A.
Step-by-step explanation:
An angle bisector is a line, ray, or segment that divides an angle into two equal parts. It divides the angle into two congruent or equal angles. The angle bisector originates from the vertex of the angle and extends towards the interior of the angle. It essentially cuts the angle into two smaller angles of equal measure.
determine the value of x
Answer:
x = 11.62
Step-by-step explanation:
opp / adj would be tangent, so the equation would be 4*tan(71) giving us 11.616, and rounding to the nearest hundredth gives you 11.62
Hope this helps :)
at castleton university alex bought three mathematics textbook and four programming textbooks athe same school rick bought eight mathematic textbooks and a single programming textbook of alex spent 854.14 rick spend 1866.39 on textbooks what was the average cost of each book
Answer:
math = 227.98
programming = 42.55
Step-by-step explanation:
We have
3m + 4p = 854.14 -eq(1)
8m + 1p = 1866.39 -eq(2)
rq(2) x 4: 32m + 4p = 7465.56 -eq(3)
eq(3)-eq(1):
32m + 4p = 7465.56
- ( 3m + 4p = 854.14)
--------------------------------
29m = 6611.42
--------------------------------
⇒ m = 6611.42/29
m = 227.98
sub in eq(1)
3(227.98) + 4p = 854.14
4p = 854.14 - 683.94
4p = 170.2
p = 170.2/4
p = 42.55
Roger can run one mile in 9 minutes. Jeff can run one mile in 6 minutes. If Jeff gives Roger a 1 minute head start, how
long will it take before Jeff catches up to Roger? How far will each have run?
Not including the head start, it will take
-
■
--
minutes for Jeff to catch up to Roger.
Each person runs 1/3 of a mile when Jeff catches up to Roger.
================================================
Explanation
x = number of minutes that Jeff runs
x+1 = number of minutes Roger runs
Roger has the head start of 1 minute, so he has been running for 1 minute longer compared to Jeff.
Roger runs 1 mile in 9 minutes. His unit rate is 1/9 of a mile per minute.
Jeff's unit rate is 1/6 of a mile per minute.
Let's set up a table with what we have so far
[tex]\begin{array}{|c|c|c|c|} \cline{1-4} & \text{Distance} & \text{rate} & \text{time}\\\cline{1-4}\text{Jeff} & d & 1/6 & \text{x}\\\cline{1-4}\text{Roger} & d & 1/9 & \text{x}+1\\\cline{1-4}\end{array}[/tex]
The distance equation for Jeff is d = (1/6)x
The distance equation for Roger is d = (1/9)(x+1)
note: distance = rate*time
Both runners travel the same distance when Jeff catches up to Roger, so both "d"s are the same value at this specific moment. Set the right hand sides equal to each other and solve for x.
(1/6)x = (1/9)(x+1)
18*(1/6)x = 18*(1/9)(x+1)
3x = 2(x+1)
3x = 2x+2
3x-2x = 2
x = 2
Jeff runs for 2 minutes when he catches up to Roger.
----------
Check:
Jeff runs for 2 minutes, at 1/6 of a mile per minute, so he runs 2*(1/6) = 2/6 = 1/3 of a mile.
Roger runs for 2+1 = 3 minutes (remember he gets the head start) at 1/9 of a mile per minute, so he has run 3*(1/9) = 3/9 = 1/3 of a mile as well.
Both men have run the same distance which confirms Jeff catches up to Roger at this point. The answer is confirmed.
You're a marketing analyst for Wal-
Mart. Wal-Mart had teddy bears on
sale last week. The weekly sales
($ 00) of bears sold in 10 stores
was:
8 11 0 4 7 8 10 583
At the .05 level of significance, is
there evidence that the average
bear sales per store is more than 5
($ 00)?
Based on the data and the one-sample t-test, at the 0.05 level of significance, there is sufficient evidence to conclude that the average bear sales per store at Wal-Mart is significantly higher than $500
.
To determine if there is evidence that the average bear sales per store at Wal-Mart is more than $500 at the 0.05 level of significance, we can conduct a one-sample t-test. Let's go through the steps:
State the null and alternative hypotheses:
Null hypothesis (H₀): The average bear sales per store is equal to or less than $500.
Alternative hypothesis (H₁): The average bear sales per store is greater than $500.
Set the significance level (α):
In this case, the significance level is given as 0.05 or 5%.
Collect and analyze the data:
The weekly sales of bears in 10 stores are as follows:
8, 11, 0, 4, 7, 8, 10, 583
Calculate the test statistic:
To calculate the test statistic, we need to compute the sample mean, sample standard deviation, and the standard error of the mean.
Sample mean ([tex]\bar X[/tex]):
[tex]\bar X[/tex] = (8 + 11 + 0 + 4 + 7 + 8 + 10 + 583) / 8
[tex]\bar X[/tex] ≈ 76.375
Sample standard deviation (s):
s = √[Σ(x - [tex]\bar X[/tex])² / (n - 1)]
s ≈ 190.687
Standard error of the mean (SE):
SE = s / √n
SE ≈ 60.174
Now, we can calculate the t-value:
t = ([tex]\bar X[/tex] - μ₀) / SE
Where μ₀ is the hypothesized population mean ($500).
t = (76.375 - 500) / 60.174
t ≈ -7.758
Determine the critical value:
Since we are conducting a one-tailed test and the alternative hypothesis is that the average bear sales per store is greater than $500, we need to find the critical value for a one-tailed t-test with 8 degrees of freedom at a 0.05 level of significance. Looking up the critical value in the t-distribution table, we find it to be approximately 1.860.
Compare the test statistic with the critical value:
Since -7.758 is less than -1.860, we have enough evidence to reject the null hypothesis.
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Geno read 126 pages in 3 hours. He read the same number of pages each hour for the first 2 hours. Geno read 1.5 times as many pages during the third hour as he did during the first hour.
Geno read 36 pages during the first and second hour, and 1.5 times that, which is 54 pages, during the third hour.
Let's break down the information given:
Geno read 126 pages in 3 hours.
He read the same number of pages each hour for the first 2 hours.
Geno read 1.5 times as many pages during the third hour as he did during the first hour.
Let's solve this:
Let's assume that Geno read x pages during the first hour.
Since he read the same number of pages each hour for the first 2 hours, he also read x pages during the second hour.
During the third hour, Geno read 1.5 times as many pages as he did during the first hour, which is 1.5x pages.
To find the total number of pages he read, we can add up the pages from each hour: x + x + 1.5x = 126.
Combining like terms, we have 3.5x = 126.
Divide both sides of the equation by 3.5 to solve for x: x = 36.
Therefore, Geno read 36 pages during the first and second hour, and 1.5 times that, which is 54 pages, during the third hour.
In summary, Geno read 36 pages during each of the first two hours and 54 pages during the third hour, for a total of 126 pages in 3 hours.
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Please awnser asap I will brainlist
The system has exactly one solution. The solution is (13, 8)
How to calculate the solution to the system of equationsFrom the question, we have the following parameters that can be used in our computation:
Country A: -x + 20y = 147
Country B: -x + 10y = 67
Country C: y = 8
So, we have
-x + 20y = 147
-x + 10y = 67
y = 8
Substitute 8 for y in the first and second equations
So, we have
-x + 20 * 8 = 147
-x + 10 * 8 = 67
Evaluate the products
-x + 160 = 147
-x + 80 = 67
So, we have
x = 160 - 147
x = 80 - 67
Evaluate
x = 13
x = 13
Hence, the solution to the system of equations is (13, 8)
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