Answer:
a. what is the perimeter of a square with side length:
3 cm=12cm
7 cm=28
b.90
here you go, hope it's right
width= w
length = l=w+5
Area = l * w
104 =(w+5) * w
w2 +5w -104 =0
(w+13)(w-8)=0
w=13 and w=8
so width =8
length=13
