3.5.5.15 Question Help
Reasoning Joanne cannot decide which of two washing machines to buy. The selling price of
each is $720. The first is marked down by 50%. The second is marked down by 30% with an
additional 20% off. Find the sale price of each washing machine. Use pencil and paper. Explain
why Joanne should buy the first washing machine rather than the second if the machines are the
same except for the selling price.

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )

1.4 x 10^5 have a nice day!