Describe a strategy to visualize and calculate=20% off
40.

32

Step-by-step explanation:

First you're going to change 20% to a decimal which would be 0.20

Next, multiply .20 by 40

You should get 8

Subtract 8 from 40

You're answer is 32

x = 1.2; y = -2.8

Step-by-step explanation:

y = x -4

y = 6x -10

y -x = -4

y -6x = -10

Subtracting the equations:

5x = 6

x = 6/5 or 1.2

Substitute x = 1.2

y = 1.2 - 4

y = -2.8 or -14/5