Question

how much is 8 nickles and 12 pennies

Answer 1

A nickel is 5 cents each and n=nickel so 5n is a nickel, and a penny is 1 cent each so p=penny so 1p is a nickel then you plug them in and get:
5(8) and 1(12) and that = 52 cents

The answer is 52 cents

Answer 2

nickel = $0.05
pennies = $0.01

(0.05 x 8) + (0.01 x 12) =
0.40 + 0.12 = 0.52
$0.52  or 52 cents