Question

The perimeter of a rectangle is 215 feet. The short sides are each 24 feet long, but the lengths of the long sides are unknown. Which equation represents this situation?

24a=215

2(24)+2a=215

24+2a=215

2(24)a=215

Answer 1

2 ( 24 ) + 2 a = 215

Explanation:

Perimeter of the rectangle is 215 feet, the short sides are 24 feet long and we need to work out the long sides (we will call a long side 'a') so,

24 + 24 + a + a = 215

Answer 2

For this case we have to:

Let "a" be the variable that represents the length of the rectangle and let "b" be the variable that represents the width of the rectangle. Then the perimeter is given by:

`P = 2a + 2b`

We have as data that:

`P = 215 \ feet\\b = 24 \ feet`

Then, replacing:

`215 = 2a + 2 (24)`

Answer:

Option B