What is the volume of the composite figure?
12in
4 in
3 in.
7 in.

Step-by-step explanation:

, where b, h, w are base, height and width respectively.

, where h is the height, and A_b is the area of the base.

First let's calculate the volume of the paralelipiped by the first formula.

Then let's find out the height of the pyramid, which is 12 - 4 = 8 in.(See drawing)

Then the area of the base of the square pyramid is simply.

Now we can find the volume of the pyramid.

To find the total volume, let's add both volumes.

where are the images of the functions i can only see the question you typed.

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.