Question

20 POINTS EACH PERSON

The perimeter of a rectangular swimming pool is represented by the expression 8x – 2. If the width of the swimming pool is represented by the expression x – 1, which expression represents the length of the pool? 7x – 1 6x – 4 3x 6x

Answer 1

61 ft

Explanation:

Answer 2

The length of rectangle is 3x.

Explanation:

Given that the perimeter of rectangle formula is P = 2l + 2w where l represents length and w is width. Then you have to substitute the expressions into the formula :

`p = 2l + 2w`

Let p = 8x - 2,

Let w = x - 1,

`8x - 2 = 2l + 2(x - 1)`

`8x - 2 = 2l + 2x - 2`

Next you have to find the expression for length by moving all the unrelated terms to the other side :

`8x - 2 - 2x + 2 = 2l`

`2l = 6x`

`l = 3x`