The functions show two sister's savings accounts and rate at which they plan to deposit money

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.

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

The suare root of 9x plus 7 plus the square rot of 2x equall to 7