Question 140017
a) 


Let L=length, W=width



b)

Since "The length of the box is 15 inches more than the width", this means the first equation is {{{L=W+15}}}



Remember the perimeter formula is {{{P=2*W+2*L}}}


If we plug in {{{P=42}}}, we get the second equation: 


{{{42=2*W+2*L}}}



So the two equations are:

 {{{L=W+15}}}

{{{42=2*W+2*L}}}



c) the product of the two dimensions of the rectangle is 


{{{W*L=W*(W+15)=W^2+15W}}}



d) The perimeter is a linear equation while the product is a nonlinear equation