<PRE><B>Question 706371</B>
(A)rea = (L)ength x (W)idth = 494
L = W + 7

By substitution,

A = (W+7)(W) = 494
{{{W^2 + 7W - 494 = 0}}}

By factoring, we get:
(W-19)(W+26)=0; W=19, W=-26(Disregard this since there is no negative width)

So the dimensions are L=19+7=26ft and W=19ft.</PRE>