a. Mean = 3
Standard deviation = 2
b. The z-scores for each score in the sample are: 1, -1.5, 0.5, 1, -1, -0.5, 0.5.
a. To compute the mean and standard deviation for the sample, we follow these steps:
Calculate the mean (average)
Mean = (sum of all scores) / (number of scores)
Mean = (5 + 0 + 4 + 5 + 1 + 2 + 4) / 7
Mean = 21 / 7
Mean = 3
The mean of the sample is 3.
Calculate the standard deviation
The formula for standard deviation for a sample is given by:
Standard deviation = sqrt((sum of squared differences from the mean) / (number of scores - 1))
First, calculate the squared differences from the mean for each score:
(5 - 3)^2 = 4
(0 - 3)^2 = 9
(4 - 3)^2 = 1
(5 - 3)^2 = 4
(1 - 3)^2 = 4
(2 - 3)^2 = 1
(4 - 3)^2 = 1
Next, sum up these squared differences:
4 + 9 + 1 + 4 + 4 + 1 + 1 = 24
Now, divide this sum by (number of scores - 1):
24 / (7 - 1) = 24 / 6 = 4
Finally, take the square root of this result:
Standard deviation = sqrt(4) = 2
The standard deviation of the sample is 2.
b. To find the z-score for each score in the sample, we use the formula:
z = (X - Mean) / Standard deviation
For each score, we substitute the values into the formula:
X = 5, z = (5 - 3) / 2 = 2 / 2 = 1
X = 0, z = (0 - 3) / 2 = -3 / 2 = -1.5
X = 4, z = (4 - 3) / 2 = 1 / 2 = 0.5
X = 5, z = (5 - 3) / 2 = 2 / 2 = 1
X = 1, z = (1 - 3) / 2 = -2 / 2 = -1
X = 2, z = (2 - 3) / 2 = -1 / 2 = -0.5
X = 4, z = (4 - 3) / 2 = 1 / 2 = 0.5
The z-scores for each score in the sample are:
z = 1, z = -1.5, z = 0.5, z = 1, z = -1, z = -0.5, z = 0.5
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Determine the range of the following graph:
Answer: [-2,7]
Step-by-step explanation: The range of a graph is just the range of minimum and maximum outputs of the y axis. The minimum y axis value is -2, while the maximum is 7. Putting your answer in brackets means that the endpoints (-2 and 7) are inclusive, which is the case since the dots are filled in. If the dots are hollow, the range does not include those endpoints and you would use parentheses instead.
What is the degree in leading coefficient of f(x) equals 3X -5
Answer:
1
Step-by-step explanation:
The degree of a polynomial is the exponent of the varieble x. So the exponent of x in that function is 1.
B
A
C
Intro
y
-6
4
3
2
+
1
2 3
x
Suppose quadrilateral ABCD has been transformed by
Ty=x. What are the coordinates for the vertices of the
reflected quadrilateral A'B'C'D'?
A' =
B' =
C' =
D'=
The coordinates of the reflected quadrilateral A'B'C'D' are:
A' = (6, 4)
B' = (-3, 2)
C' = (-1, 23)
D' = (-x, 12)
To find the coordinates of the reflected quadrilateral A'B'C'D', we need to apply the transformation Ty = x to each vertex of the original quadrilateral ABCD. The transformation Ty = x reflects each point across the y-axis.
Given the coordinates of the original quadrilateral ABCD as:
A = (-6, 4)
B = (3, 2)
C = (+1, 23)
D = (x, 12)
Applying the transformation Ty = x to each vertex, we can determine the coordinates of the reflected quadrilateral A'B'C'D':
A' = (-(-6), 4) = (6, 4)
B' = (-3, 2)
C' = (-1, 23)
D' = (-x, 12)
The reflected quadrilateral A'B'C'D' thus has the following coordinates:
A' = (6, 4)
B' = (-3, 2)
C' = (-1, 23)
D' = (-x, 12)
Therefore, the x-coordinate for point D' will be represented as -x in the reflected quadrilateral.
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John can ride his bide 4 miles in 30
minutes. At his current rate, what is the
distance, in miles, John can ride his
bike in 12 minutes?
The distance John can ride his bike in 12 minutes is approximately 1.6 miles.
To find out the distance John can ride his bike in 12 minutes, we can use the information given about his rate of riding.
We are told that John can ride his bike 4 miles in 30 minutes. This implies that his rate of riding is 4 miles per 30 minutes.
To calculate the distance John can ride in 12 minutes, we need to determine the proportion of time he is riding compared to the given rate.
We can set up a proportion to solve for the unknown distance:
(4 miles) / (30 minutes) = (x miles) / (12 minutes)
Cross-multiplying, we get:
30 minutes * x miles = 4 miles * 12 minutes
30x = 48
Now, we can solve for x by dividing both sides of the equation by 30:
x = 48 / 30
Simplifying the fraction, we have:
x = 8/5
So, John can ride his bike approximately 1.6 miles in 12 minutes, at his current rate.
Therefore, the distance John can ride his bike in 12 minutes is approximately 1.6 miles.
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HELP ME PLS I'LL MARK BRAINLIEST AND GIVE U 13 POINTS
Answer:
The answer is number 3
Y =-3/7X + 3
Step-by-step explanation:
Substitue with the value of the two points in all answers
The value of the left side must equal the value or the right side
For instance,
The two points are (0,3) & (7,0)
Substitue in the first answer with the point (0,3)
3 = - 3 (rejected)
Second answer
3 = 3 works for the point (0,3) then also Substitue with the other point (7,0)
0 = 6 (rejected)
The third answersub. With point (0,3).
3 = 3 it worksSub. With point (7,0)
0= - 3+3 0=0 it worksThen that's the right one
15. AB2+ BC2 = AC²
O A.
OB.
O C.
OD.
2 BDC = LADB
LBCA
DCB
2 BAC = LBAD
2 DBC = LBAC
multipl
Rese
Answer:
Step-by-step explanation:
Please answer ASAP I will brainlist
Answer:
-x + 20(8) = 147 -x + 10(8) = 67
-x + 160 = 147 -x + 80 = 67
x = 13 x = 13
A. The system has exactly one solution. The solution is (13, 8).
B. All three colonies had a population of 8 thousand people in 2013.
Question 11 of 26
Given the diagram below, what is cos(45)?
Triangle not drawn to scale
A. √2
O B.
√3
C. 3-√2
45⁰
OD.
Answer:
chemical reaction that releases heat energy to the surroundings is known as endothermis reaction
(5/8x+y^5)(y^5- 5/8x) write the expression as a polynomial
100 points for this
Answer:
y^10 + (5/8xy^5 - 5/8xy^6) - (25/64x^2)
Step-by-step explanation:
To simplify the given expression, we can expand it using the distributive property:
(5/8x + y^5)(y^5 - 5/8x)
Expanding the expression yields:
= (5/8x * y^5) + (5/8x * -5/8x) + (y^5 * y^5) + (y^5 * -5/8x)
= (5/8xy^5) - (25/64x^2) + y^10 - (5/8xy^6)
Combining like terms, we have:
= y^10 + (5/8xy^5 - 5/8xy^6) - (25/64x^2)
Hope this help! Have a good day!
The base of a triangle is 21 inches and the height is 12 inches. Which of these expressions correctly shows how to calculate the area of a triangle?
A. (21 × 12) × 2
B. (21 + 12) ÷ 2
C. (21 + 12) × 2
D. (21 × 12) ÷ 2
The correct expression to calculate the area of a triangle with a base of 21 inches and height of 12 inches is (21 × 12) ÷ 2.
Explanation:The subject of your question is Mathematics, specifically dealing with the topic of how to calculate the area of a triangle. The formula to calculate the area of a triangle is 1/2 multiplied by the base multiplied by the height. So, in your question where the base of the triangle is 21 inches and the height is 12 inches, the correct choice would be D. (21 × 12) ÷ 2 which applies the formula correctly.
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if a=7 and b =2 what is 2ab
Answer: 28
Step-by-step explanation:
If [tex]a = 7[/tex] and [tex]b = 2[/tex], then [tex]2ab[/tex] can be worked out as follows:
[tex]\Large 2ab = 2 \times a \times b[/tex]
Substituting the values of [tex]a[/tex] and [tex]b[/tex], we get:
[tex]2 \times 7 \times 2 = 28[/tex]
Therefore, [tex]2ab[/tex] is equal to 28 when [tex]a = 7[/tex] and [tex]b = 2[/tex].
________________________________________________________
The answer is:
28Work/explanation:
To evaluate the expression [tex]\sf{2ab}[/tex], I begin by plugging in 7 for a and 2 for b:
[tex]\large\pmb{2(7)(2)}[/tex]
Simplify by multiplying.
[tex]\large\pmb{2*14}[/tex]
[tex]\large\pmb{28}[/tex]
Therefore, the answer is 28.what is the value of [3]\[n]{x}[/64}
Answer:
all go d Alaska causticC field lap cc feels it works happy claps dockside all letter or quip all L do all app all app all app all do all app all app all app all app 10 10 all do all app all app so we rip so do all
Step-by-step explanation:
w usually app all app all do all app so all rip so we rip do all do all app all do all do all do all do all rip trip we rip all app so all do all do all app all do all app all yep all app all app all app all app all app all app all app to
Find the length of an isosceles 90 degree triangle with the hypothenuse of 4 legs x
The length of the hypotenuse in the isosceles 90-degree triangle is √(2).
In an isosceles 90-degree triangle, two legs are equal in length, and the third side, known as the hypotenuse, is longer. Let's denote the length of the legs as x and the length of the hypotenuse as 4x.
According to the Pythagorean theorem, in a right triangle, the sum of the squares of the lengths of the two legs is equal to the square of the length of the hypotenuse. In this case, we have:
[tex]x^2 + x^2 = (4x)^2.[/tex]
Simplifying the equation:
[tex]2x^2 = 16x^2.[/tex]
Dividing both sides of the equation by [tex]2x^2[/tex]:
[tex]1 = 8x^2.[/tex]
Dividing both sides of the equation by 8:
[tex]1/8 = x^2[/tex].
Taking the square root of both sides of the equation:
x = √(1/8).
Simplifying the square root:
x = √(1)/√(8),
x = 1/(√(2) * 2),
x = 1/(2√(2)).
Therefore, the length of each leg in the isosceles 90-degree triangle is 1/(2√(2)), and the length of the hypotenuse is 4 times the length of each leg, which is:
4 * (1/(2√(2))),
2/√(2).
To simplify the expression further, we can rationalize the denominator:
(2/√(2)) * (√(2)/√(2)),
2√(2)/2,
√(2).
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which of the following is equivalent to x^2 -5x +6
Hello!
x² - 5x + 6
= (x² - 2x) + (-3x + 6)
= x(x - 2) - 3(x - 2)
= (x - 2)(x - 3)
when 24/5and another number are added together the answer is 9. what is the number
The number we're looking for, which when added to 24/5 results in 9, is 21/5 or 4.2 in decimal form.
Let's solve the equation: 24/5 + x = 9, where x represents the unknown number we're trying to find.
To isolate x, we'll start by subtracting 24/5 from both sides of the equation:
x = 9 - 24/5
To add these two fractions, we need a common denominator. The denominator of 9 is 1, and the denominator of 24/5 is 5. To find a common denominator, we multiply 1 by 5:
x = (9 * 5)/5 - 24/5
This gives us:
x = 45/5 - 24/5
Now we can combine the fractions with the same denominator:
x = (45 - 24)/5
Simplifying the numerator:
x = 21/5
Therefore, the number we're looking for is 21/5. In decimal form, it can be written as 4.2.
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The diagram shows the curve y = √8x + 1 and the tangent at the point P(3, 5) on the curve. The tangent meets the y-axis at A. Find:
(i) The equation of the tangent at P.
(ii) The coordinates of A.
(iii) The equation of the normal at P.
The tangent and normal lines of the curve:
Case (i): y = (4 / 5) · x + 13 / 5
Case (ii): (x, y) = (0, 13 / 5)
Case (iii): y = - (5 / 4) · x + 35 / 4
How to determine the equations of the tangent and normal lines
In this problem we have the representation of a curve whose equations for tangent and normal lines must be found. Lines are expressions of the form:
y = m · x + b
Where:
m - Slopeb - Interceptx - Independent variable.y - Dependent variable.Both tangent and normal lines are perpendicular, the relationship between the slopes of the two perpendicular lines is:
m · m' = - 1
Where:
m - Slope of the tangent line.m' - Slope of the normal line.The slope of the tangent line is found by evaluating the first derivative of the curve at intersection point.
Case (i) - First, determine the slope of the tangent line:
y = √(8 · x + 1)
y' = 4 / √(8 · x + 1)
y' = 4 / √25
y' = 4 / 5
Second, determine the intercept of the tangent line:
b = y - m · x
b = 5 - (4 / 5) · 3
b = 5 - 12 / 5
b = 13 / 5
Third, write the equation of the tangent line:
y = (4 / 5) · x + 13 / 5
Case (ii) - Find the coordinates of the intercept of the tangent line:
(x, y) = (0, 13 / 5)
Case (iii) - First, find the slope of the normal line:
m' = - 1 / (4 / 5)
m' = - 5 / 4
Second, determine the intercept of the normal line:
b = y - m' · x
b = 5 - (- 5 / 4) · 3
b = 5 + 15 / 4
b = 35 / 4
Third, write the equation of the normal line:
y = - (5 / 4) · x + 35 / 4
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Solve the problem. Use what you learned from the example.
Use the information
in the tree diagram.
Write a statement that
is always true about
obtuse triangles. Write
a statement that is
sometimes true about
obtuse triangles.
Show your work. Use pictures and words to explain.
Acute
Equilateral
Triangles
Right
Isosceles
Obtuse
Scalene
C
Statement that is always true about obtuse triangles:
An obtuse triangle always has one angle that measures more than 90 degrees.
In the given tree diagram, the "Obtuse" category represents triangles with at least one obtuse angle.
An obtuse angle is an angle that measures more than 90 degrees. Since an obtuse triangle is defined as having one obtuse angle, it will always have an angle that measures more than 90 degrees.
Therefore, the statement that an obtuse triangle always has one angle that measures more than 90 degrees is always true.
Statement that is sometimes true about obtuse triangles:
An obtuse triangle can have different side lengths.
In the given tree diagram, the "Obtuse" category represents triangles with at least one obtuse angle.
The "Scalene" category represents triangles with different side lengths. Therefore, it is possible for an obtuse triangle to have different side lengths, making the statement "An obtuse triangle can have different side lengths" sometimes true.
However, it is also possible for an obtuse triangle to have two or more sides with the same length, which would make it an isosceles or equilateral triangle.
Hence, the statement is only sometimes true and not always true.
In summary, an always true statement about obtuse triangles is that they always have one angle that measures more than 90 degrees.
A sometimes true statement about obtuse triangles is that they can have different side lengths.
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Determine the equation of the circle graphed below 100pts
Answer:
[tex](x +5)^2+(y-1)^2=25[/tex]
Step-by-step explanation:
To determine the equation of the graphed circle, we need to find the coordinates of its center and the length of its radius.
The center of the circle is a single point that lies at an equal distance from all points on the circumference of the circle.
From inspection of the graphed circle, we can see that its domain is [-10, 0] and its range is [-4, 6]. The x-coordinate of the center is the midpoint of the domain, and the y-coordinate of the center is the midpoint of the range.
[tex]x_{\sf center}=\dfrac{-10+0}{2}=-5[/tex]
[tex]y_{\sf center}=\dfrac{-4+6}{2}=1[/tex]
Therefore, the center of the circle is (-5, 1).
The radius of the circle is the distance from the center to all points on the circumference of the circle. Therefore, to calculate the length of the radius, find the distance between x-coordinate of the center and one of the endpoints of the domain.
[tex]r=0-(-5)=5[/tex]
Therefore, the radius of the circle is r = 5.
To determine the equation of the circle, substitute the center and radius into the standard formula.
[tex]\boxed{\begin{minipage}{4 cm}\underline{Equation of a circle}\\\\$(x-h)^2+(y-k)^2=r^2$\\\\where:\\ \phantom{ww}$\bullet$ $(h, k)$ is the center. \\ \phantom{ww}$\bullet$ $r$ is the radius.\\\end{minipage}}[/tex]
As h = -5, k = 1 and r = 5, then:
[tex](x - (-5)^2+(y-1)^2=5^2[/tex]
[tex](x +5)^2+(y-1)^2=25[/tex]
Therefore, the equation of the graphed circle is:
[tex]\boxed{(x +5)^2+(y-1)^2=25}[/tex]
Angelica’s bouquet of a dozen roses contains 5 white roses. The rest of the roses are pink. What fraction of the bouquet is pink roses? There are 12 roses in a dozen.
StartFraction 5 Over 12 EndFraction
StartFraction 7 Over 12 EndFraction
StartFraction 5 Over 7 EndFraction
Which equation best shows that 45 is a multiple of 15?
Choose 1 answer:
A45-15 = 30
B
45 x 3 = 15
48= 45 +3
45÷3= 15
The correct Option is D. 45÷3= 15 . The equation that best shows that 45 is a multiple of 15 is 45 ÷ 3 = 15.
A multiple is a product that results from multiplying two or more numbers.
A common multiple is a multiple that is common to two or more numbers.
A multiple of a number can be expressed as an integer multiple of the number.
If the result is a whole number, the first number is a multiple of the second.
An equation that shows 45 is a multiple of 15 is as follows: 45 ÷ 3 = 15.
A multiple is a number that can be divided by another number without leaving a remainder.
As a result, we divide 45 by 3 to find out whether 45 is a multiple of 15.
If the result is a whole number, 45 is a multiple of 15.
Here is the equation that shows this: 45 ÷ 3 = 15
Thus, we can conclude that the equation that best shows that 45 is a multiple of 15 is 45 ÷ 3 = 15.
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Given f(x) = √6x and g(x)=
-9
=
Which value is in the domain of fᵒg?
-1
1
x - 6
Click on the correct answer.
6
7
The values in the domain of fᵒg are all real numbers.
Therefore, the correct answer is: x - 6.
To determine the domain of the composite function fᵒg, we need to find the values of x that are valid inputs for the composition.
The composite function fᵒg represents applying the function f to the output of the function g. In this case, g(x) is equal to -9.
So, we substitute -9 into the function f(x) = √6x:
f(g(x)) = f(-9) = √6(-9) = √(-54)
Since the square root of a negative number is not defined in the set of real numbers, the value √(-54) is undefined.
Therefore, -9 is not in the domain of fᵒg.
To find the values in the domain of fᵒg, we need to consider the values of x that make g(x) a valid input for f(x).
Since g(x) is a constant function equal to -9, it does not impose any restrictions on the domain of f(x).
The function f(x) = √6x is defined for all real numbers, as long as the expression inside the square root is non-negative.
So, any value of x would be in the domain of fᵒg.
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Which ordered pair makes both inequalities true?
y < –x + 1
y > x
On a coordinate plane, 2 straight lines are shown. The first solid line has a negative slope and goes through (0, 1) and (1, 0). Everything below and to the left of the line is shaded. The second dashed line has a positive slope and goes through (negative 1, negative 1) and (1, 1). Everything above and to the left of the line is shaded.
(–3, 5)
(–2, 2)
(–1, –3)
(0, –1)
The ordered pair that is a solution for both inequalities is (-2, 2).
Which ordered pair makes both inequalities true?Here we have the system of inequalities:
y < -x + 1
y > x
And we want to see which one of the given points makes both of them true.
To find that, just replace the values in both inequalities and see if both become true or not.
For example, for the first point:
(-3, 5)
We will get:
5 < -(-3) + 1 = 4
5 > -3
The first one is false, and the second one is true.
The correct option is the second point:
2 < -(-2) +1 = 3
2 > -2
Both are true.
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Select the correct answer. Which function represents the inverse function of the function f(x)=x^2 +5
Answer:
f^(-1)(x) = ±√(x - 5).
Step-by-step explanation:
Replace f(x) with y: y = x^2 + 5.
Swap the x and y variables: x = y^2 + 5.
Solve the equation for y. To do this, we'll rearrange the equation:
x - 5 = y^2.
Take the square root of both sides (considering both positive and negative square roots):
±√(x - 5) = y.
Swap y and x again to express the inverse function:
f^(-1)(x) = ±√(x - 5).
What is the volume of the following triangular prism?
A. 380 m³
B. 398 m³
C. 351 m³
D. 327 m³
Answer:
C-351
Step-by-step explanation:
Find the area of the shaded portion if we know the outer circle has a diameter of 4 m and the inner circle has a diameter of 1.5 m.
A. 43.2 m2
B. 10.8 m2
C. 12.6 m2
D. 1.8 m2
Function A is represented by the equation y= 6x-1.
Function B is a linear function that goes through the points shown in the
table.
x 13 4 6
y 0 10 15 25
Which statement correctly compares the rates of change of the two
functions?
A. The rate of change of function A is 6.
The rate of change of function B is 5.
B. The rate of change of function A is 6.
The rate of change of function B is 10.
C. The rate of change of function A is
-1.
The rate of change of function B is 5.
D. The rate of change of function A is
-1.
The rate of change of function B is 10.
The rates of change of the two functions that compare correctly is A. The rate of change of function A is 6, and the rate of change of function B is -10/9.
To compare the rates of change of the two functions, we can calculate the slope of each function. The slope represents the rate of change of a linear function.
For Function A, the equation is y = 6x - 1. The coefficient of x, which is 6, represents the slope. The rate of change of Function A is 6.
For Function B, we are given three points: (13, 0), (4, 10), and (6, 15). We can calculate the slope using the formula: slope = (change in y) / (change in x). Taking the first two points, we have: slope = (10 - 0) / (4 - 13) = 10 / (-9) = -10/9.
Comparing the rates of change, we have:
A. The rate of change of function A is 6.
The rate of change of function B is -10/9.
The correct option is A. The rate of change of function A is 6, and the rate of change of function B is -10/9.
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Bela's ice cream cone is 9 inches tall and 6 inches across. What volume of ice cream can fit within the cone? Show your work and draw a picture of the scenario. Type your answer as a number only. Round your answer to the nearest tenth. Volume = cubic inches
The volume of ice cream that can fit within the cone is 84.78 cubic inches.
To determine the volume of ice cream that can fit within the cone, we can consider the cone as a right circular cone with a height of 9 inches and a radius of 3 inches (half of the diameter, which is 6 inches).
The formula for the volume of a right circular cone is given by:
V = (1/3) * π * r^2 * h
where V represents the volume, π is a mathematical constant (approximately 3.14159), r is the radius, and h is the height.
Substituting the given values into the formula, we have:
V = (1/3) * 3.14159 * 3^2 * 9
= (1/3) * 3.14159 * 9 * 9
≈ 84.78 cubic inches
Therefore, the volume of ice cream that can fit within the cone is approximately 84.78 cubic inches.
To provide a visual representation, imagine a cone shape with a height of 9 inches and a diameter of 6 inches. The radius is half of the diameter, so it is 3 inches.
The ice cream fills the cone up to the top, creating a rounded triangular shape. The volume of the ice cream is equivalent to the volume of this cone shape.
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Note the complete question is
Bela's ice cream cone is 9 inches tall and 6 inches across. What volume of ice cream can fit within the cone? Show your work and draw a picture of the scenario.
Type your answer as a number only.
Round your answer to the nearest tenth. Volume = cubic inches
How many gallons of a 90% antifreeze solution must be mixed with 100 gallons of 25% antifreeze to get a mixture that
is 80% antifreeze? Use the six-step method.
You need gallons.
(Round to the Question Viewer ber.)
answer
Answer:
550 gallons
Step-by-step explanation:
Let [tex]x[/tex] be the number of gallons for the 90% antifreeze solution and [tex]x+100[/tex] be the total number of gallons that will contain 80% antifreeze solution:
[tex]\displaystyle \frac{0.90x+0.25(100)}{x+100}=0.80\\\\0.90x+25=0.80x+80\\\\0.10x+25=80\\\\0.10x=55\\\\x=550[/tex]
Therefore, you would need 550 gallons of the 90% antifreeze solution.
NO LINKS!! URGENT HELP PLEASE!!
29. A tree casts a shadow that is 12 feet long. If the tree is 20 feet tall, what is the angle of elevation of the sun? Draw a diagram to represent the situation. Round the answer to the nearest tenth.
30. In ΔABC, m∠A = 75°, m∠B = 50°, and c = 9. Draw ΔABC, then use the Law of Sines to find a. Round final answer to the nearest tenth.
Answer:
29. 59.06°
30. 10.6
Step-by-step explanation:
29.
By using the Tangent angle rule, we can find the angle of elevation,
We know that
Tan Angle = opposite/adjacent
Tan x=AB/BC
Tan x=20/12
Tan x=5/3
[tex]x=Tan^{- }(\frac{5}{3})[/tex]
x=59.06°
30.
The law of sine is a formula that can be used to find the lengths of the sides of a triangle, or to find the angles of a triangle, when two sides and the angle between them are known. The formula is:
a / sin(A) = b / sin(B) = c / sin(C)
Here taking
a / sin(A) = c / sin(C)
here A=75°, C=180-75-50=55° and c -9 and
we need to find a,
substituting value
a/Sin(75°)=9/Sin(55°)
a=9*Sin(75°)/Sin(55°)
a=10.61
Therefore, the value of a is 10.6
Answer:
Question 29: Angle of Elevation is -------> 59.0°Question 30: The length of side A in --------> △ABC is approximately 10.3Step-by-step explanation:Question 29: In this question, we can use the tangent function to solve the problem. We can set the Sun's elevation angle as theta (θ). Then we can get the equation:
tan (θ) = 20/12, and solve for θ
Solve the problem:We can draw a right triangle with the tree, the shadow, and the Sun.The tree's height is the opposite side, and the length of the shadow is the adjacent side.The angle of the sun's elevation is the angle between the ground and the line from the top of the tree to the sun.We can set the angle of elevation of the sun as theta (θ).We then get the equation tan (θ) = 20/12
We can solve for theta (θ) using the equationθ = arctan(5/3)
We can use a calculator to find that: Let the angle of elevation = θTan θ = opp/adj
Tan θ = 20/12
θ = Tan^-1 (20/12)
θ = 59.03624346 degrees
θ = 59.0 degrees
Draw the conclusion:Hence, the Angle of Elevation is -------> 59.0°
Question 30: △
m < C = 180 degrees - m<A - m<B
m<C = 180 degrees - 75 degrees - 50 degrees
Simplify:
m<C = 55 degrees
Apply the Law of Sines:
a/sin A = c/sin C
Substitute the values:
a/sin 75 degrees = 9/sin 55 degrees
Solve for A:
a = 9 * sin 75 degrees/sin 55 degrees
Calculate the value of A:a = 10.3
Draw a conclusion:Therefore, The length of side A in --------> △ABC is approximately 10.3
Hope this helps you!
Which measure gives the most accurate picture of the data's centre?
The mean is the measure that gives the most accurate picture of the data's center. It is an essential measure of central tendency that represents the arithmetic average of a dataset.
It is calculated by summing up all the values in the dataset and dividing the sum by the total number of values. The mean is suitable for datasets that have a normal or symmetrical distribution.
The mean is highly sensitive to outliers, which can significantly influence the average value. When outliers are present, it is appropriate to use other measures of central tendency such as the median or mode to obtain an accurate picture of the data's center.
The median is the middle value in a dataset arranged in ascending or descending order. It is not affected by outliers and is suitable for datasets with skewed distributions.
The mode is the most frequent value in the dataset. It is suitable for categorical data but can also be used for continuous data.
In summary, the mean is the most accurate measure of central tendency, but its accuracy can be improved by using the median or mode in datasets with outliers or skewed distributions.
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