(01.02 HC) Milly has $83.50 in her savings account. She deposits $15 every week. Her mother also deposits $10 into the account every time Milly washes the car. Her savings account balance can be shown with the following expression:

10c + 15w + 83.50

Part A: Identify a coefficient, a variable, and a constant in this expression. (3 points)

Part B: If Milly saves for 15 weeks and washes the car 4 times, how much will she have in her account? Show your work to receive full credit. (4 points)

Part C: If Milly’s mom deposited $20 after each car wash, would the coefficient, variable, or constant in the expression change? Why? (3 points)