Twenty pounds of a salt-water solution contains fifteen percent salt. how much water must be added to weaken the solution to twelve percent salt?

3 lb
5 lb
12 lb

What is sin 7x/4 ? i need on this urgent trig

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

What is the shape of the height and weight distribution