How to do multiplication of fractions -6 and 3 on a number line

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

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