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

Answer:

61 ft

Step-by-step explanation:

Answer 2

Answer:

The length of rectangle is 3x.

Step-by-step 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 :

$8x - 2 - 2x + 2 = 2l$

$2l = 6x$

$l = 3x$