Find the volume of a rectangular prism. the base's length is 5, the width is 4, and the height of the prism is 7.

140

You do length times width times height.

The volume of the rectangular prism is = 140.

Step-by-step Explanation:

First we'll use the formula :

Volume = width × height ×  length

We know that :

The base length of the prism is = 5,

The width of the prism is = 4,

The height of the prism is = 7.

Now we form the equation that is :

Volume = 4 × 7 × 5 = 140

Volume = 140

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.

sina-sinb

cosb+cosa

tana-tanb

cos0+cos x pi/3

20tan

step-by-step explanation: