Alguien me ayuda con la pagina 20 de matemáticas de 3 de secundaria

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 function models the number of accidents per 50 million miles driven as a function

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid