The perimeter of a rectangle is 140 and the length is 10 more than four times the width. find the dimensions

Width = 12

Length = 58

Step-by-step explanation:

Width = x

Length = 4x + 10

Perimeter = 140

2 * ( length + width )  = 140

2 * (4x +10 + x) = 140

            5x + 10 = 140/2 = 70

                     5x = 70- 10

                     5x = 60

                         x = 60/5 = 12

Width = 12

Length = 4 * 12 + 10 = 48 +10 = 58

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation:

72 is the answer to this problem