Posted by Thomas on Sunday, January 5, 2014 at 11:09pm.
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

math  Reiny, Sunday, January 5, 2014 at 11:44pm
2(x + x+2) = 24
4x+4=24
4x=20
x=5
the original rectangle is 5 by 7
take it from there

math  Thomas, Monday, January 6, 2014 at 12:58am
so, doubling the lenghts = 2x+4
14+14+5+5=38
answer d

math  Reiny, Monday, January 6, 2014 at 11:22am
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
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