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PLEASE HELP I DON'T UNDERSTAND

PLEASE HELP I DONT UNDERSTAND class=

Sagot :

x = the number of months the tire was used
y = the thickness of the tire tread

y = -(3/7)x + 20

Substitute x for 20 (the number of months the tire was used) and solve for y.

The next question: Substitute x for 49 (the number of months the tire was used) and solve for y.