math
posted by Thomas on .
The perimeter of the rectangle is 24 cm, the long side is x + 2, the width side is x , if a new rectangle is created by doubling the lengths of the original rectangle's longest sides, what would the new rectangle's perimeter be ?
a. 17 cm^2
b. 24 cm^2
c. 31 cm^2
d. 38 cm^2
e. 48 cm^2
please answer and explain

2(x + x+2) = 24
4x+4=24
4x=20
x=5
the original rectangle is 5 by 7
take it from there 
so, doubling the lenghts = 2x+4
14+14+5+5=38
answer d 
Read your question more carefully, it said to double the original triangle's LONGEST sides
original longest side = 7
new longest side = 14
new recctangle is 5 by 14
new perimeter = 38