Question

perimeter of 18ft by area of 8ft

Answer 1

A rectangle?!

Answer 2

what is the area of a rectangle?

Answer 3

sorry i meant is it a rectangle.

Answer 4

square

Answer 5

it cannot be a square.

Answer 6

the question is"we need a rock garden with a perimeter of 18ft and the area of 8ft

Answer 7

Let l=length
Let w=width
lw=8 sq ft (area given)
2l+2w=18 ft (perimeter given)
l=8/w from the first equation above. Now subsitute in second equation for l
2(8/w)+2w=18
16/w+2w=18
16+2w^2=18w multiplying all terms by w
\[2w ^{2}-18w+16=0\]
\[w ^{2}-9w+8=0\] Dividing all terms by 2
Now factor
(w-8)(w-1)=0
w=8 or w=1
when w is 8, l is 1
when w is 1, l is 8

your rectangle is 8 by 1

Answer 8

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