Circle the fraction that tells about how much each bar is shaded

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 with this one question, and i'll upvote the brainliest answer

How do you do the foil method with polynomials?