SOLUTION: My friend and I have different calling plans. Mine has a monthly fee of $15 and $0.05 per minute charge. My friend pays $0.02 a minute and a $20 monthly customer fee. After how

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: My friend and I have different calling plans. Mine has a monthly fee of $15 and $0.05 per minute charge. My friend pays $0.02 a minute and a $20 monthly customer fee. After how       Log On


   



Question 762331: My friend and I have different calling plans. Mine has a monthly fee of $15 and $0.05 per minute charge. My friend pays $0.02 a minute and a $20 monthly customer fee.
After how many minutes will our plans cost the same amount? Round your answer to the nearest minute.

Answer by ramkikk66(644) About Me  (Show Source):
You can put this solution on YOUR website!
Let us say that after x minutes, both plans cost the same.
After x min, my plan will cost 15+%2B+0.05%2Ax
After x min, my friend's plan costs 20+%2B+0.02%2Ax
Equating the 2,
15+%2B+0.05%2Ax+=+20+%2B+0.02%2Ax
Simplifying
0.03%2Ax+=+5 or x+=+166.67
Rounding off to nearest minute, the two plans will cost the same after highlight%28167%29 minutes.
:)