Question

The formula P=2(l + w)relates the perimeter P, in decimeters, with the length and width of a rectangle.

Solve the formula for w.
1.w=2P-L
2.w=P/2+L
3.w=P/2-L
4.w=2P+L

Answer 1

3. w=P/2-L

Explanation:

Given formula:

• P=2(l + w)

Solving for w:

• P=2(l + w)
• P/2 = 2(l + w)/2
• P/2 = l + w
• P/2 - l = l + w - l
• P/2 - l = w
• w = P/2 - l

Correct answer choice is:

• 3. w=P/2-L