Question

Corinne has a job selling magazines. She earns $7.50 per hour plus 20% of the total amount of her sales. She also gets an allowance of $40 per week for gas. She knows her weekly earnings can be shown using the following expression: 7.50h + 0.20s + 40

Part A: If Corinne works for 25 hours and sells $300 in magazines, how much does she earn for the week?

Part B: If Corinne gets a raise and begins earning $9 per hour, would the coefficient, variable, or constant in the equation change? Why?

Answer 1

Part A: If Corinne works for 25 hours and sells $300 in magazines, how much does she earn for the week? 

The expression is:
7.50h + 0.20s + 40 

7.50(25) + 0.20(300) + 40 = $287.5

Part B: If Corinne gets a raise and begins earning $9 per hour, would the coefficient, variable, or constant in the equation change? Why?

The coefficient of the first term will be changed from 7.50 for 9 since the first term represents her fixed salary for working for a period of time.