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. (3 points)
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. (4 points)
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Part C: If Corinne gets a raise and begins earning $9 per hour, would the coefficient, variable, or constant in the equation change? Why?
constants -- just numbers....no letters.......ex: 5,6,7,8,9
variable -- the letters.....ex: n,m,x,y,
coefficient -- a number multiplied by a letter (variable)....ex: 4n,3y,8z
if she earned 300 and worked for 25 hrs...
so sub in 25 for h and 300 for s and solve...
7.50(25) + 0.20(300) + 40 = money earned for the week. (you can do the math)
if she earned 9.00h instead of 7.50h....so the item that will change is the number multiplied by the variable....and what is that called ?