The perimeter of a convex pentagon is 15 feet. what is the effect on its perimeter if each side is doubled?

If  each side of pentagon is doubled then its perimeter will also be doubles. The new perimeter is 30 feet.

Step-by-step explanation:

Let the length of all five sides of pentagon = v, w, x, y, and z.

Perimeter of pentagon = Sum of lengths of its all five sides = (v + w + x + y + z) = 15 feet

If each side of pentagon is doubles then,

New perimeter of pentagon = (2v + 2w + 2x + 2y + 2z)

= 2 (v + w + x + y + z)

= 2 (15)

= 30 feet

Therefore, if each side of pentagon is doubled then its perimeter will also be doubled.

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls