Question

Trini's car breaks down on a highway. Trini estimates that she is 20 to 30 miles from the nearest car repair shop. She calls a towing company that charges a fee of $80 plus $3 per mile to tow a car. If Trini uses this towing company, which is the best estimate for the amount of money, m, she will pay for the company to tow her car?

103 ≤ m ≤ 113

140 ≤ m ≤ 150

140 ≤ m ≤ 170

160 ≤ m ≤ 170

Answer 1

The amount Trini would have to pay depends on the distance: $80 up front, then $3 times the number of miles traveled, or m=80+3d.

The smallest value for d is 20, so the smallest value for m = 80 + 3(20)=140
The largest value for d is 30, so the largest value for m = 80 + 3(30) = 170.

So, \[140\le m \le 170\]

Answer 2

thank you!