PLEASE HELP!!

Supply the missing reasons to complete the proof!

Click on the graphic until you find the right quotient. (36xa - 30xb) ÷ (-6x2)

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

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?