Question 385962
David recently switched to a long distance phone company which charges a monthly fee of $5.95 plus $0.04 per minute.  A linear function that expresses the monthly bill B as a function of minutes used is B(m) = 0.04m + 5.95.  How many minutes were used for long distance if the long-distance phone bill was $17.15?
...
B(m) = 0.04m + 5.95
Bill = 17.15
17.15=0.04m+5.95
..
17.15-5.95=0.04m
11.20=0.04m
/0.04
11.20/0.04=m
{{{(highlight(m=280))}}}minutes
...
m.ananth@hotmail.ca