Como se realisa la conjugacion de elementos puros con elementos inpuros ayuda plis

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.

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

Does anyone know how to do geometryme with this problem