Question

Javier has a job installing windows. He earns a rate of $75 per day plus $8 per window installed. He also receives a stipend of $25 for snacks. Javier knows his weekly earnings can be shown with the following expression:

75d + 8w + 25

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

Part B: If Javier works for 5 days and installs 48 windows, how much does he earn? Show your work to receive full credit. (4 points)

Part C: If Javier gets an increase in his stipend and receives $40 for snacks, would the coefficient, variable, or constant in the equation change? Why? (3 points)

Answer 1

Part A: A coefficient would be 8, a variable would be w, and a constant would be 25.

Part B: 75(5)+8(48)+25=375+384+25= $784

Part C: If Javier gets an increase in his snack stipend, the constant in the equation would change, because the snack stipend does not depend on anything else, like the rate for days or windows.