Help me please? An explanation too? Cause I’m really slow at learning and my teachers just go without me on stuff :/

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?

Danny can read 4 pages in 12 minutes. how many pages can he read in 1 hour?

Find the sale price to the nearest cent. $4.30 makeup; 40% discount; 6% tax