Question

The perimeter of a rectangle is 50 inches. The length of the rectangle is 10 inches. Which

method can be used to find w, the width of the rectangle?
Divide 50 by 2 and then add 10.
Solve for w in the equation 2 (W + 10) = 50.
Solve for w in the equation 2w + 10 = 50.
Divide 50 by the product of 10 and 2.

Answer 1

• B. Solve for w in the equation 2 (W + 10) = 50

Explanation:

• P = 50 in
• l = 10 in
• w = ?

Perimeter formula

• P = 2(l + w)

Solving for w

• 50 = 2(10 + w)
• 10 + w = 50/2
• 10 + w = 25
• w = 25 - 10
• w = 15

Option B is correct