If a Triangle ΔABC has a perimeter of 38 and AC≅DC as well as BD≅BA than the side DC can be measures as CD=38-AB-BC if AB and BC are given.
What is a triangle?A triangle is a three-sided polygon, which has three vertices. The three sides are connected with each other end to end at a point, which forms the angles of the triangle. The sum of all three angles of the triangle is equal to 180 degrees.
What is a formula of perimeter of triangle?In the case of a triangle, the perimeter will be the sum of all the three sides. If a triangle has three sides a, b and c, then, Perimeter, P = a + b +c
As the perimeter of a triangle ABC is
Perimeter=AB+BC+CA
And we are given with only the perimeter of triangle;
P=38m
Now;
As given condition is;
AB=BD, AC=CD So;
38=AB+BC+CD
And
CD=38-AB-BC
If then length of the sides of AB and BC are provided we can calculate the value of CD
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A car wash makes $7 profit p per car, resulting in the equation of the total T; T = 7p. If the car wash made $147, how many cars were washed?
Solve the system of equations using elimination:
-5x + 8y = -6.
-
- 5y = -9 and
Answer:
x=102/25 y=9/5
Step-by-step explanation:
The number of different hands possible in the game of bridge is about 635 billion. Write this number in scientific notation
Two perpendicular lines intersect at K(-2,-5). One line has equation y = -5/3x-25/3. what is the equation of the other line?
Answer:
It is y = 3/5x - 19/5
Step-by-step explanation:
Perpendicular lines have negative reciprocal slopes. Thus, the slope is 3/5x. Plug in -2 as x and solve for the intercept. It ii -19/5.
PLEASE HELP I REALY NEED THIS NOW How much simple interest is earned on an investment of $800 with a rate of 6.1% over 7 years?
A. $341.60
B. $410.87
C. $3,416.00
D. $4,108.70
The amount of simple interest is (a) $341.60
How to determine the amount of simple interest?From the question, we have the following parameters that can be used in our computation:
Principal, P = $800
Rate, r = 6.1 %
Time = 7 years
The simple interest on the investment is calculated as
I = PRT
Substitute the known values in the above equation, so, we have the following representation
I = 800 * 6.1% * 7
Express 6.1% as decimal
So, we have the following representation
I = 800 * 0.061 * 7
Evaluate the products
I = 341.6
Hence, the amount is (a) $341.6
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Point QQ is located at (3,-1)(3,−1) on the coordinate plane. Point QQ is reflected over the yy-axis to create point Q'Q ′ . What ordered pair describes the location of Q'?Q ′ ?
The ordered pair that describes the location of Q' is (-3, -1)
How to determine the ordered pair that describes the location of Q?From the question, we have the following parameters that can be used in our computation:
Point Q = (3, -1)
This point can be represented as
(x, y) = (3, -1)
Also, from the question, we have the transformation to be:
Point Q is reflected over the y-axis
Mathematically, this can be expressed as
(x, y) = (-x, y)
So, we have the following representation
Point Q' = (-3, -1)
Hence, the image is (-3, -1)
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At the Wheatley School, the probability that a student takes Math 8 and Technology is 0.12. The probability the student takes Math 8 is 0.16. Find the probability that the student takes technology given that he is taking Math 8.
The probability that the student takes technology given that he is taking Math 8 is 0.075.
What is conditional probability?
Conditional probability is a term used in probability theory to describe the likelihood that one event will follow another given the occurrence of another event.
Here, we have
Given:
The probability that a student takes Technology and Math 8 is 0.012.
P(Technology and Math 8) = 0.012
The probability that a student takes Math 8 is 0.16.
P(Math 8) = 0.16
We have to find the probability that a student takes Technology given that the student is taking Math 8
we use conditional probability
P(Technology|Math 8) = P(Technology and Math 8)/P(Math 8)
P = 0.012/0.16
P = 0.075
Hence, the probability that the student takes technology given that he is taking Math 8 is 0.075.
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The function rule for this graph is
Answer:
Step-by-step explanation:
(0, 2) (4, 0)
(0 - 2)/(4 - 0) = -2/4 = -1/2
y - 2 = -1/2(x - 0)
y - 2 = -1/2x + 0
y = -1/2x + 2
Min receives an average score of 7 after completing 5 math tests. If she has another test coming up, find what mark she must gain to raise her average to 75.
Min needs to gain 80 marks to raise her average to 75.
What is Average number?Average number is got from sum of all numbers divided by the number of values.
Why we use average value?Average value is used to compare among different quantities of same terms.
given, Min receives an average score 70 from 5 math test.
let she needs to gain X in her 6th test to obtain an average of 75 from the total six test.
she gained average 70 from 5 test
if average is 75 then
75 = (X+ 70)/2
X=80
hence, in the 6th test she needs to gain 80 marks.
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#9 -5=9+(c divide by 4) *
O A. c = -56
O B. c = 56
O C. c = -16
OD. c = 16
After solving the given equation for c, we know that the value of c is (A) -56.
What are equations?Equivalent systems refer to sets of equations with the same solution.
We can create an analogous system from a system of two equations by replacing one equation with the total of the two equations or by replacing an equation with a multiple of itself.
So, we have the equation:
-5 = 9+(c/4)
Now, solve for the subject c as follows:
-5 = 9+(c/4)
-5 -9 = (c/4)
-14 = c/4
c = -14*4
c = -56
Therefore, after solving the given equation for c, we know that the value of c is (A) -56.
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Suppoe that the concentration of a bacterial ample i 100,000 bacteria per millimeter. If the concentration double every three hour how long will it take for the concentration to reach 350,000 material per millimeter?
The time t = 3.4209 will it take for the concentration to reach 350,000 material per millimeter.
How do you calculate hours and minutes?In an hour, there are 60 minutes. Divide the number of minutes by 60 to convert it to hours. For instance, 120/60=2 means that 2 hours are equal to 120 minutes.
What is millimeter?The millimeter, abbreviated mm in the International System of Units (SI), or millimeter, abbreviated mm in the American spelling, is a unit of length that is one thousandth of a metre long, the SI base unit of length. As a result, a metre is made up of 1000 millimeters.
We are going to use formula
y = a * e ^ (b * t)
a and b are constants and t is for time.
Initially there are 100,000 bacteria, so;
100000 = a * e ^ (b * 0)
100000 = a * 1
a = 100000
given condition is that the concentration doubles every 3 hours so
300000 = a * e ^ (b * 3)
As a equals to 100,000
e ^ (b * 3) = 3
b * 3 = ln 3
b = (ln 3) / 3
b = 0.3662
now we have to find value of the time when concentration of bacteria reaches to 350,000:
350000 = 100000 * (e ^ 0.3662 * t)
3.5 = e ^ 0.3662* t
ln 3.5 = 0.3662* t
t = 1.2527 / 0.3662
t = 3.4209
That is the required value of time
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A regular polygon has its interior angles all equal to 171 Find the number of sides of the polygon.
The measure of the interior angles of a polygon is determined by the formula ((n - 2)180)/n = interior angle
measure
find a equation line perpendicular to y-8=-2x that passes through the point (8,-5)
Answer:
Step-by-step explanation:
y = -2x + 8
perp.: 1/2
y + 5 = 1/2(x - 8)
y + 5 = 1/2x - 4
y = 1/2x - 9
Out of 400 plants sold daily at a nursery, 90% of them have flowers. How many of the plants have flowers?
Answer: 360 plants
Step-by-step explanation:
90% is equivalent to 0.90.
You multiply 0.90 and get your answer of 360.
Please help me!!!!!!!!!!!!
Answer:
Step-by-step explanation: One denominator in the question is 4/5 and another is 1/2. A common denominator would be /10 because it applies to /5 and /2.
Help me out!! Giving Brainly to whoever helps!
Answer: 325 adult tickets
Step-by-step explanation:
721 = (a+71) + a
721 = 2a + 71
2a = 650
a = 325
through (4,-9) perpendicular to 8y=x-16
Answer:
y = -8x + 23
Step-by-step explanation:
8y=x-16
we need to turn this into slope-intercept form by dividing 8 on both sides
y = x/8 - 2
to make a line perpendicular from another, we must make sure the slope is the negative reciprocal of the original line.
Right now, it's the same as the original. To make it a negative reciprocal, switch the places of the denominator and numerator and flip the signs
-8x is the negative reciprocal of x/8
Does it go through (4,-9)? No.
To make sure it goes through 4,-9, we change it's y-intercept.
Plug in the coordinate given (4,-9) in the y = -8x + b ( we removed -2 since it's not the right answer.
y = -8x + b
(-9) = -8(4) + b
-9 = -32 + b
-9 +32= -32 + b +32
23 = b
plug in b and we get our answer
y = -8x + 23
The diagram shows a sector of a circle radius 10 cm.
Find the area of the sector, giving your answer correct to 1 decimal place.
Answer:
[tex]117.8cm ^{2} [/tex]
Step-by-step explanation:
[tex]a = {r}^{2} \theta \: \div 2 \\ = 100 \times 135 \div 2 \\ = 117.8 \: {cm}^{2} [/tex]
What is the equation for the graph shown?
The linear equation on the graph shown is:
y = (2/3)*x + 4
What is the equation on the graph?
We can see that we have a linear equation on the graph, remember that a general linear equation is:
y = a*x + b
Where a is the slope and b is the y-intercept.
On the graph, we can see that the line intercepts the y-axis at y = 4, then the y-intercept is b = 4
y = a*x + 4
To find the slope we can use another point on the line, for example, we can see that (-6, 0) is also on the line, replacing these values in the linear equation above we will get:
0 = a*-6 + 4
6a = 4
a = 4/6 = 2/3
Thus, the line is:
y = (2/3)*x + 4
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∠ABC and ∠KLC form a linear pair with m∠ABC = 74° and m∠KLC = x°.
Answer:
106
Step-by-step explanation:
A linear pair adds to 180
180 - 74 = 106
what is 6 plues 9 i need it plesae.
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Write an equation in standard form of the line that passes through the given point and has the given slope (I need an answer ASAP please)
1. (4, -1); m = 3
2. (-8, 0); m = -4
3. (-6, -10); m = 1/6
The equation of the lines is,
1. (4, -1); m = 3 : - y = 3x - 13
2. (-8, 0); m = -4 :- y = -4x - 24
3. (-6, -10); m = 1/6 :- y = -1/6x - 9
What is an equation of the line?An equation of the line is defined as a linear equation having a degree of one. The equation of the line contains two variables x and y. And the third parameter is the slope of the line which represents the elevation of the line.
The general form of the equation of the line:-
y = mx + c
m = slope
c = y-intercept
Slope = ( y₂ - y₁ ) / ( x₂ - x₁ )
The equation of the lines will be,
y = mx + c
y = 3x + c
-1 = 4 x 3 + c
c = -13
y = 3x - 13
y = mx + c
y = -4x + c
0 = -4 x -8 + c
c = -24
y = -x -24
y = mx + c
y = 1/6x + c
-10 = -1 + c
c = -9
y = -1/6x - 9
Therefore, the equation of the lines is,y = 3x - 13 y = -4x - 24 and y = -1/6x - 9.
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which is more likely rolling a total of 8 when two dice are rolled or rolling a total of 8 when thre dices are roled
Answer: Two dice
Step-by-step explanation:
For the two dice, there are 5 possible: (6, 2);(5, 3);(4, 4);(3, 5);(2, 6)
So two dice, the probability is 5/36 = 30/216
For three dice, the number of favorable cases is 21
The probability is 21/216
So the two dice are more likely
what time will it be in 2 hours 30 minutes . if I went to work at 11:30 am and I clock out in 2 hours 30 minutes but what time will it be in 2 hours 30 minutes
Answer:
I'm pretty sure it would be 3:00
Step-by-step explanation:
I could be wrong tho-
To prove that the triangles are similar by the SAS
similarity theorem, it needs to be shown that
Ozcazc
OC 2G
O AC-H
BC
O AC-BE
HI
It needs to be shown that <W = <H by the SAS congruent theorem
How to determine the additional information?The question is added as an attachment
From the question, we have the following parameters that can be used in our computation:
Triangles = IWO, and IHOGiven theorem = SASThe SSS congruent theorem implies that the corresponding sides of the triangles in question and the angles between them are congruent
From the question, we can see that the following corresponding sides on the triangles have the same mark
W O and H O
AO and AO
This implies that these sides are congruent sides
For the triangle to be congruent by SAS, the following sides must also be congruent
Angle W must be congruent to Angle H
Hence, the additional info is <W = <H
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Complete question
To prove that the triangles are similar by the SAS similarity theorem, it needs to be shown that____
The total height of a building, b, and the antenna tower on top of it, t, is 425 feet. The difference in heights of the building and the antenna tower is 324 feet. The following system of equations represents the situation.
b + t = 425 b- t = 324
a. Solve the system of equations using elimination. Explain your process in your own words.
b. What is the height of the antenna tower?
Answer:
It A
Step-by-step explanation:
The results of a series of surveys revealed a population with a mean of 15 and a standard deviation of 1.88. If each survey has a sample size of 70, which value falls within the interval where 95% of the sample means occur?
A) 15.66
B) 15.49
C) 14.96
D) 14.34
If each survey has a sample size of 70, a value which falls within the interval where 95% of the sample means occur is: C) 14.96.
What is a confidence interval?In this scenario, the confidence interval at 95% can be represented by this mathematical expression p - E < p < p + E
Based on the parameters provided, we would determine both the lower limit and upper limit for the interval where 95% of the sample means occur as follows;
Lower limit = 15 - 1.88/√70
Lower limit = 15 - 0.23
Lower limit = 14.77
For the upper limit, we have:
Upper limit = 15 + 1.88/√70
Upper limit = 15 + 0.23
Upper limit = 15.23
For 95% of the sample means to occur, the confidence interval is given by;
Confidence interval = (14.77, 15.23)
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Josephine earns a salary of $560.00 per week, plus a commission of 10% on all sales. Last week, she sold $843 worth of goods. How much was she paid?
The amount that Josephine will be paid is $644.30.
How much was Josephine paid?A percentage is a value or ratio that may be stated as a fraction of 100. If we need to calculate a percentage of a number, we should divide it's entirety and then multiply it by 100. The percentage therefore refers to a component per hundred.
In this situation, Josephine earns a salary of $560.00 per week, plus a commission of 10% on all sales and she sold $843 worth of goods.
The amount she'll be paid will be:
= $560 + (10% × $843)
= $560 + $84.3
= $644.30
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A full pond containing 625 gallons of water begins losing its water at a rate of 20% per week. If the pond now contains 320 gallons of water, how many weeks has it been since the pond was at full capacity?
(Use the digits 0 – 9 to enter a number. Use a decimal point only if necessary.)
Using an exponential function to represent the exponential decay, it will take approximately 4 weeks to reach 320 gallons
Exponential EquationAn exponential function is a mathematical function in the form f (x) = ax, where “x” is a variable and “a” is a constant which is called the base of the function and it should be greater than 0.
To solve this problem, we have to write an exponential equation to calculate the exponential decay.
Data;
A = 320P = 625r = 20% = 0.2t = ?A = P(1 + r)⁻ˣ
320 = 625(1 + 0.2)⁻ˣ
x = 3.67
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Monica has $50 to spend at the video arcade. If each game costs $0.25, which of these graphs shows how much
money she will have after x games?
Answer:
A
Step-by-step explanation:
If Monica has $50 dollars to spend on the video arcade, and each game costs $0.25 then we can use an equation that looks something like this:
total = amount of money × cost of one game
50 × 0.25 = 200
Now look at the graphs.
The graph that best matches this equation is A.