HELP I NEED HELP ASAP

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

Aflower has 26 chromosomes. to create a new flower, how many would a sperm cell have what is called?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class