Which expression is equivalent to -6x^3•x•y^2•y^6

Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?