Help me out please thanks

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 system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n