What is the surface area of the right triangular prism below?

Step-by-step explanation:

to work out surface area you need to figure out the area of each face on the shape.

the first side is 7.5 x 9 = 67.5

there are two of these sides

this makes 135mm

the top side is (4.5 x 6) / 2

this makes 13.5

there are also two of these sides making 27mm

finally the back side is 4.5 x 9 = 40.5

there are only one of these sides

this makes 40.5mm

finally you need to add all these sides

135 + 27 + 40.5 = 202.5

the surface area is 202.5mm

The number you're looking for is 96.

Step-by-step explanation:

Our number will be x.

0.25(x) = 1/3x - 8

First, subtract 1/3 from both sides. You end up with -0.83333x = -8

Then, divide both sides by -0.83333. You end up with 96.