depth=8mm-.12x where x is thousands of miles
2=8-.12x
x=6/.12=50 ?
A new set of car tires has a tread depth of 8 millileters. The tread depth decreases 0.12 millimeter per thousand miles driven. Write an equation that gives the tread depth as a function of the distance driven. Then predict what distance the tread depth will be 2 millimeters....
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