How did you get ab=15
And 7a+2b=c as well, I'm a bit lost

Find the number if 5% of it is 24% of 15.5.

Alaser tag arena sells two types of memberships. one package costs $325 for one year of membership with an unlimited number of visits. the second package has $125 enrollment fee, includes five free visits, and costs and additional $8 per visit after the first five. how many visits would a person need to use for each type of membership to cost the same amount over a one-year period?

The authors use the word “backbone” in lines 3 and 39 to indicate that