math
posted by barb .
jared wants to save $100 to buy a tennis racket.he saves $8 each week,and his mother gives him an extra $0.25 for each dollar he save.determine the number of weeks it will take jared to save $100.

8 + (8 * 0.25) = $10
100/10 = _____ weeks 
Buses to the stadium leave central station every 10 minutes.buses to the zoo leave central station every 16 minutes both buses leave central station at 4 p.m.find the next time both buses will leave central station at the same time

The least common multiple of 10 and 16 is 80.
4:00 + 0:80 = 6:20 
4:00 + 0.80 = 5:20

Buses to the stadium leave Central Station every 10 minutes. Buses to the zoo leave Central Station every 16 minutes. Both buses leave Central Station at 8 p.m. Find the next time both buses will leave Central Station at the same time.