Question

Marla has $95.50 in her savings account. She deposits $5 every week. Her mother also deposits $20 into the account every time Marla washes the car. Her savings account balance can be shown with the following expression: 20c + 5w + 95.50 Part A: Identify a coefficient, a variable, and a constant in this expression. (3 points) Part B: If Marla saves for 20 weeks and washes the car 5 times, how much will she have in her account? Show your work to receive full credit. (4 points) Part C: If Marla’s mom deposited $10 after each car wash, would the coefficient, variable, or constant in the expression change? Why? (3 points)

Answer 1

20(5) + 5(20) + 95.50 = money in account
100 + 100 + 95.50 = $295.5
Part B = $295.5
If Marla's mom deposited $10 after each car wash the coefficient would change.
20c+5w+95.50 - the 20 beside the c is the coefficient and the 95.50 is the constant. A coefficient is the number being multiplied to the variable. In this case c is the variable and 20 is the coefficient. Therefore the constant would change.
Part C = If Marla's mom deposited $10 after each car wash the coefficient would change.