Charles owed $390 to his friend. On the first day Charles paid his friend $12. Each following week the amount Charles paid his f

Question

3 years ago

5

Charles owed $390 to his friend. On the first day Charles paid his friend $12. Each following week the amount Charles paid his f

riend increased by the same amount. After 10 payments, Charles had paid back the full amount. By how much did each payment increase?

Mathematics

1 answer:

tensa zangetsu [6.8K] · Answer 1 · 2021-11-18T10:22:41+03:00

tensa zangetsu [6.8K]3 years ago

6 0

Hello! Ok, so this is the formula x10 + 12 = 390 =
x10 + 12 - 12 = 390 - 12 = 378 =
x10 = 378 =
x10 / 10 = 378 / 10 =
x = 37.80$
He paid 37.80$ per payment