Algebra 2 Word Problem?
A new set of tires has a thread depth of 8 millimeters. The tread depth decreases .12 millimeters per thousand miles driven. Write an equation that gives the tread depth as a function of the distance driven. Then predict at what distance the tread depth will be 2 millimeters.
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lets call tread depth t, and the mileage m
t = 8 - 0.12m/1000
t = 8 - 0.00012m
t = 2
2 = 8 - 0.00012m
0.00012m = 6
m = 6/0.00012 = 50000
so after 50 000 miles the treadd depth will be 2 millimeters