Use the formula to find the value of the variable indicated. Use a calculator to save time and where necessary, round your
answer to the nearest hundredth.
-P = 2l + 2w; find l when P = 24 and w = 4.
A) l = 16
B) l = 10
C) l = 8
D) l = 20

Question

Quizplus · Accepted Answer

We are given the formula P=2l+2w and the values P=24 and w=4. 
Substituting the given values, we get:
24=2l+2(4)
24=2l+8
Subtracting 8 from both sides:
16=2l
Dividing both sides by 2:
l=8

Therefore, the best choice is C as it correctly solves for the value of l.

Use the Formula to Find the Value of the Variable