The equation C = 1.5 + 2.5X is used to determine the cost C, in dollars, of mailing a shipment weighing X pounds. An increase of 10 dollars in mailing cost is equivalent to an increase of how many pounds in weight?
Q1. The equation C = 1.5 + 2.5X is used to determine the cost C, in dollars, of mailing a shipment weighing X pounds. An increase of 10 dollars in mailing cost is equivalent to an increase of how many pounds in weight?
Answer: 4
Explanation: In the equation C = 1.5 + 2.5X, each additional pound increases cost by $2.50; a $10 increase corresponds to 10/2.5 = 4 pounds.