The length of a rectangle is 7 inches longer than the width (x).
Which is the area (y) when the width (x) is 14 inches?
we know that
The area of rectangle is equal to
A=LW
we have that
L=W+7
so
when the value of W=14 in
substitute
L=14+7=21 in
Find the area
A=(21)(14)=294 in^2
therefore
the answer is
294 square inches