PLESSE HELP, ANSWER THE 2ND AND 3RD

What signals you that factoring by grouping is the best method to use when factoring a problem?

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

The reflexive property of congruence lets you say that ∠pqr ≅