Answer:
178 miles
Step-by-step explanation:
We know that there is a constant of $14.20 that is the fee. This can represent b in our slope intercept formula. For every mile, the cost is 16 cents, which can replace m when x represents the number of miles driven.
y=mx+b
y=.16x+14.20
We know her entire bill is 42.68, so we can plug that in as y and solve for x.
42.68=.16x+14.20
Minus 14.20 from both sides
28.48=.16x
Divide both sides by .16
x=178
