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

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

cas_fangirl_14 · Answer

$\color{Purple}{Part~A}$: coefficient: 75    Variable: d   constant: 25
$\color{Purple}{Part~B}$: 75d+8w+25=
75*5+8*48+25=
375+384+25=
759+25=
784
$\color{Purple}{Part~C}$: the constant would change, because there is no variable attached to the number.