SOLUTION: Hello, there's a question that I'm not quite understanding. It goes like this. It states "Amazon offers an interesting deal: (234 diapers for $46.99/ 160 diapers $34.99) if you p

Algebra ->  Equations -> SOLUTION: Hello, there's a question that I'm not quite understanding. It goes like this. It states "Amazon offers an interesting deal: (234 diapers for $46.99/ 160 diapers $34.99) if you p      Log On


   

Question 1057299: Hello, there's a question that I'm not quite understanding. It goes like this.
It states "Amazon offers an interesting deal: (234 diapers for $46.99/ 160 diapers $34.99) if you pay $79 per year to join their "Amazon Mom" club, you get 20% off all diaper purchases.
What would the $46.99 box of diapers cost with that discount? Write an equation that provides the total cost C of buying x boxes of diapers in one year with the Amazon Mom membership. Use the equation to find the cost of buying 10 boxes of diapers in a year if you join Amazon Mom.
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
If you get 20% off it means that instead of paying 100% you are paying 100-20 = 80%. As you know, 80 percent literally means 80 out of 100 (that's the % sign). So if you want to apply it to one you have to divide by 100. Thus, for calculations purposes we use 0.80 (80/100).
:
C = 79+[(46.99*0.80)x]
for 10 boxes:
79+[(46.99*0.80)10] = your answer. Use your calculator