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: identify a coefficient, a variable, and a constant in this expression.
part b: if corinne works for 25 hours and sells $300 in magazines, how much does she earn for the week?
part c: if corinne gets a raise and begins earning $9 per hour, would the coefficient, variable, or constant in the equation change? why?

Hey!

Part A
So the coefficient would be the number that is with a variable. The coefficient of 7.50h is 7.50. The variable is h, variables can be a letter or symbol that stands for something in a equation. For this question, h stands for the number of hours Corinne works. The constant is the number that is alone in the equation. That doesn't have a variable with it. In this equation the constant would be the number 40.

Part B
To solve this I will plug in 25 into "h" in and 300 for "s" in the equation 7.50h + 0.20s + 40 and then solve.

1. 25 * 7.50 = $187.5.
2. 0.20 * 300 = $60
3. Add it all together: $187.50 + $60 = $247.50 + $40 = $287.50

Part C
If Corrine gets a raise and earns $9 an hour the coefficient would change. It would be 9h instead of 7.50h.

Hoped this helped. :)

(-0, -7) is your answer