The length of a field is three times its width. if the perimeter is 64 m, what is the width of the field? a. 8 m b. 16 m c. 21 m d. 32 m

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.