4. which set of expressions below does not
represent equivalent expressions?
a. 8(3x + 7) and 8(3x) + 8(7)
b.) 3(8x + 7) and 11x + 10
c. 7(3x + 8) and 7 - 3x + 7.8
d. 3(7x + 8) and 2 1x + 24

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

50 points~ ! i have to turn this in tomarrow

If it 8 inch candle burns at 7/10 inch per hour and a 6 inch candle burns at 1/5 inch per hour after how many hours would both candles be the same height