Ok, So I thought these were pretty easy until everything I tried didn't work.
(1)The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May it cost her $380 to drive 480 mi and in June it cost her $460 to drive 800 mi.
(a) Express the monthly cost C as a function of the distance driven d, assuming that a linear relationship gives a suitable model.
C(d) =
I thought it would be 4x-1040, as I used that to solve the next question in the series. buttt it wasn't.
Other TOTALLY unrelated question:
(2)Jason leaves Detroit at 2:00 P.M. and drives a a constant speed west along I-90. He passes Ann Arbor, 40 mi from Detroit, at 2:50 P.M.
(a) Express the distance d traveled (in miles) in terms of the time t elapsed (in hours).
d(t) =
things I've tried that are incorrect: 4/5t, 48 (mph), d/t, 40/.8333
Thanks.
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