Posted by John on Wednesday, August 22, 2012 at 10:29pm.
one side --- 4.5
other side ---- x
area = 4.5x
perimeter = 2x + 9
translate " size of a rectangle's area is twice as large as the size of it's perimeter " into
4.5x = 2(2x+9)
4.5x = 4x + 18
.5x = 18
x = 36
the other side is 36
check:
area = 4.5(36) = 162
perimeter = 2(4.5+36) = 81
is 162 twice 81 ??? Sure is !
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