13) 120 + 1.5 + 0.25 = 121.75 pounds
14) 4 - 1.5 = 2.5 pints
15) (2.25)(32)= $72
5x + 8y = 4.....when x = 4
5(4) + 8y = 4
20 + 8y = 4
8y = 4 - 20
8y = - 16
y = -16/8
y = -2 <==
Lennon used the property o addition
37.7 is the circumference, 113.1 is the area, use a calculator for more in depth looks.
