I need help ASAP! Thank you :)

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?

1/4x+5=3/4. i can't get access to the answer to this question! and, my request on "contact us" will not go

Acircle has a diameter of 10 what is the area of the circle? use 3.14 for pi. round to the nearest hundredth