Help, 50 points Solve the system of equations below using substitution.

y = 3x

x − y = −6

Solution: ( , )

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27