2x-4+4x-1=8x-43
-2x=-38
x=19
so QS=2(2*19-4)=68
1 hundred, 1 ten, 8 ones.
Answer:
a) About 48 of the shoppers, that is
of the shoppers, received a free set of earbuds.
b) About 58 shoppers, that is
received $5 off their first purchase.
Step-by-step explanation:
a. About how many shoppers received a free set of earbuds?
21% out of 230. So

About 48 of the shoppers, that is
of the shoppers, received a free set of earbuds.
b. About how many shoppers received $5 off their first purchase?
25% out of 230, so:

About 58 shoppers, that is
received $5 off their first purchase.
Answer:
Profit = 935
Step-by-step explanation:
Purchase price: 500×1.28=640
Selling price: 500×3.15=1575
Profit: selling price - purchase price = profit
1575 - 640 = 935
Profit = 935