Answer:
6 quarters and 9 nickels
Step-by-step explanation:
6 quarters is equal to $1.50. 6 nickels is equal to $0.30. Those together equal $1.80, then add the three nickels bringing your total to $1.95.
The equation with (x) in dogs and (y) in dollars is 
First, you must set up your equation.

Then, you must add like terms to simplify the equation

Step-by-step explanation:

where


32 = 2x2x2x2x2
99 = 11x3x3
100 = 5x5x2x2
400 = 2x2x2x2x5x5
39 = 3x13
35 = 5x7
80 = 2x2x2x2x5
42 = 2x3x7
5 = 1x5
78 = 2x3x13