Clarissa is 14 years old, her brother Luis is 4 years more than half her age. Write a numerical expression that can be used to find Luis’s age. Do not use an equal sign in the expression or find Luis’s age.

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.

Can someone me out here and the tell me the greatest common factor

Why is studying fractions important