A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter.

Answer 1

A rectangle has four sides, two of one length and two of another. So you would create this equation to solve the problem:

2(3x-4) + 2(7x + 10)

The first half would reduce to:

6x - 8

And the second half:

14x + 20

Then you add them together:

6x - 8 + 14x + 20

And solve the common variables:

20x + 12

And your final answer would be:

p (perimeter) = 20x + 12

Answer 2

Thank you for the explanation, it will definetly help me with the other problems.