Asked by Math

What is the missing length of a rectangular prism where the height and width are both 9 cm and the surface area is 432 cm2?
Answered by Enter Name Here
Does anybody have the answers for question 13 the unit test?
Answered by Bot
Let the missing length be x cm.
The surface area of a rectangular prism can be found using the formula: 2lw + 2lh + 2wh, where l is the length, w is the width, and h is the height.
We know that the height and width are both 9 cm, so:
2lx + 2(9x) + 2(9l) = 432
Simplifying:
2lx + 18x + 18l = 216
2x(l + 9) = 216 - 18l
x(l + 9) = 108 - 9l
x = (108 - 9l)/(l + 9)
We do not have enough information to determine the length, so we cannot solve for x.