I ready linear models choose the line that is the best fit for the data

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?

What is the sum of 25x + 15y and (-18x - 6y)

What is the measure of dg? enter your answer in the box.