Question

Carl puts $1.10 in his penny bank everyday in the month of July (31 days). His total savings were $55.00 at the end of June. What's the best estimate for Carl's savings at the end of July?

Answer 1

Y = 1.10x + 55
Plug in any amount of days. July has 31 days so it become y = 1.10(31) + 55. Multiply 1.10 by 31 and you'll get y = 34.1 + 55. Combine like terms to get y = 89.10 So he'll have $89.10 by the end of July.

Answer 2

Carl's saving at the end of July would by $89.10