math help pleaseee (: ! <345
posted by Mary .
One hiking club charges $20 to become a member and $5 to participate on each hike. Anotherclub charges no membership fee, but charges $7 to participate on each hike. How many hikes must you go on to make the first club more economical ?(:

Just make up a table of cost vs number of hikes for each club
#Hikes #1 Cost #2 Cost
0 20 0
2 30 14
4 40 28
6 50 42
8 60 56
10 70 70
The club with the membership fee is more economical if you take more than 10 hikes. 
11. It is $20 to start, every hike, you are charged $2 more from the second company. If you divide 20 by 2, 10 will be even and at 11 it will be 2 $ more.