1.

Billy-Bob has a piggy-bank filled with nickels and quarters totaling $11.90.

The piggy-bank contains 74 coins in all. How many of each coin does he

have?

x = 33

y = 41

Step-by-step explanation:

GIven

x: number of nickels

y: number of quarters

A nickel = $0.05

A quarter = $0.25

then we have the system of equations

0.05*x + 0.25*y = 11.90

x + y = 74

Which can be solved applying any of known methods. Then, the solution is

x = 33

y = 41