When making a long distance call from a certain pay phone, the first three minutes of a call cost $3.00. afterthat, each additio

Question

3 years ago

11

When making a long distance call from a certain pay phone, the first three minutes of a call cost $3.00. afterthat, each additio

nal minute or portion of a minute of that call costs $0.45. use an inequality to find the numberof minutes one can call long distance for $8.40?

Mathematics

1 answer:

motikmotik · Answer 1 · 2022-08-28T14:50:48+03:00

motikmotik3 years ago

4 0

3 + 0.45*M<=8,40. Notice the equal, because you may use all the money. Then, rearranging: M<=(8.40-3)/0.45= 12, so M<=12. Now, obviously time is positive, so you may end saying 0<=M<=12, with M=0 meaning no call! :)