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 allowa
nce 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? Show your work to receive full credit. Part C: If Corinne gets a raise and begins earning $9 per hour, would the coefficient, variable, or constant in the equation change? Why?
variable : a letter subbed in for an unknown number : s and h coefficient : the number multiplied by the variable : 7.50 and 0.20 constant : just a lone number, no variable attached : 40
Corrine works for 25 hrs and sells 300......h = 25, s = 300 7.50h + 0.20s + 40 7.50(25) + 0.20(300) + 40 = 187.50 + 60 + 40 = 287.50 <===
if she gets a raise and earns 9 per hr... the coefficient would change from 7.50 per hr to 9.00 per hr. because her pay rate has changed. the new equation would then be : 9h + 0.20s + 40
You would move the decimal point two times to the left for the decimal. 0.076 For the fraction, we would make it 76/1000 because the 6 converted in the decimal is in the thousandth place. We can simplify it and get 19/250.
