Question

9) Eric and Charlotte collected donations for the food bank. Charlotte collected 3 times the amount

of Eric's donations minus $20. Eric and Charlotte combined their donations and spend half of the
money on canned food. The rest of the money, $50, was donated to the food bank directly. How
much did each student collect?
10) A.A.Ron Balakay's cell phone costs $18 per month plus $0.15 for every minute she uses the
phone. Last month her bill was $29.95. For how many minutes did she use her phone last
month?

Answer 1

9. charellote 80 Eric 20 10. 79.66 mins

Answer 2

9) Charlotte collected $70 and Eric collected $30.

10) He used her cellphone for 80 minutes (approximated).

Explanation:

9)

Charlotte = 3x - 20 (70)

Eric = x (30)

3x - 20 + x = 100 (because the half of the money was $50)

4x - 20 = 100

4x = 120

x = 30

10) 18 + x(0.15) = 29.95

x(0.15) = 11.95

x = 79.6

Hope this was helpful :)