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e-lub [12.9K]
2 years ago
12

What is the value of x? please help me! A. 43 B. 62 C. 105 D. 115

Mathematics
1 answer:
Valentin [98]2 years ago
6 0

Answer:

C

Step-by-step explanation:

x is the exterior angle of angle EFG while EFG = 180 - 62 - 43 = 75

—> x = 180 - 75 = 105

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A student wanted to construct a 95% confidence interval for the mean age of students in her statistics class. She randomly selec
Alex_Xolod [135]

Answer:

95% confidence interval for the population mean is 20.255 and 17.945

Step-by-step explanation:

given data

mean = 19.1

standard deviation = 1.5

n = 9

to find out

95% confidence interval for the population mean

solution

we know 95% confidence interval formula i.e.

mean +/- t * standard deviation/\sqrt{n}   .............1

here t for 9 students 2.31 ( from t table)

so put all value n t standard deviation and mean in equation 1

= mean +/- t * standard deviation/\sqrt{n}

= 19.1 +/- 2.31 * 1.5/\sqrt{9}

= 19.1 +/- 2.31 * 1.5/\sqrt{9}  

= 20.255 and 17.945

95% confidence interval for the population mean is 20.255 and 17.945

7 0
3 years ago
5(X-4) +2= -173 what is value of x?
m_a_m_a [10]

Answer:

The value of x is -31.

Step-by-step explanation:

To solve this, follow the order of operations for solving equations. The step-by-step is listed below.

5(x - 4) + 2 = -173 ----> Subtract 2 from both sides

5(x - 4) = -175 ----> Divide both sides by 5

x - 4 = -35 ----> Add 4 to both sides

x = -31

7 0
3 years ago
A parallelogram is shown below:
Marina CMI [18]
<h3>Answer:</h3>

A:  6 ft²

B:  3 ft² is the area of each of the two congruent triangles

<h3>Step-by-step explanation:</h3>

Part A. As with a rectangle, the area of a parallelogram is the product of base length and height.

  Area = (8 ft)·(3/4 ft) = 6 ft²

___

Part B. If you cut the area into two halves, each half will have half the area of the original. (That should not be a surprise.)

  triangle area = (6 ft²)/2 = 3 ft²

If the triangles are created by a diagonal across the original figure, each will have a base length and height that is the same as that of the original figure. The area of a triangle is half the product of base and height, so each triangle will have area ...

  triangle area = (1/2)bh = (1/2)(8 ft)(3/4 ft) = 3 ft²

5 0
3 years ago
Read 2 more answers
A kitchen counter will be designed according to the measurements of the diagram in the image. What is the area of the surface of
Semmy [17]

Answer:

B:31.5

Step-by-step explanation:

Find areas of both rectangles by multiplying the 2 given values (12 & 15)

Take the sides parallel to the triangles non-hypotenuse sides (3 & 3)

Take both values and add them over 2

Receive the answer 4.5

Add that to the rectangle values for an answer of 31.5

Hope this helps

Have a good day

7 0
3 years ago
Read 2 more answers
G = {(5, 3), (2, 3), (6, 4)} Is G-1 a function and why?
galben [10]
To get G^-1 all we need to do is flip the points around Example for (5,3) make it (3,5)
Here are the points in inverse (3,5); (3,2); (4,6)
To tell if a group of point can be a function we need to 1st look at the x values.  If all the x values are different, then it is a function (the x's are not all different)
If there are x values that are the same, they MUST have the same y value.
look at the points (3,5) and (3,2) those have the same x but they go to different y values so it is not a function.

You can think about it like this.  Can you go to more than 1 place at the EXACT same time?  Obvious answer is no. Can you have multiple people go to the same room?  Sure that is possible.  Same with functions.  An x value can ONLY go to 1 y value, and many different x values can go to the same y value.
4 0
3 years ago
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