Wis 80%of y. how many singers were there

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.

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15