Help ah

brainliest for 1st answer

What is the inverse of the function f(x)=4x+8

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

Me i’m stuck on all these questions besides the two bottom ones