Multiple choice

The cost of sending a package by special delivery is x cents per ounce upto 10 ounces and y cents for each ounce in excess of 10 ounces. Which of the following represents the cost (in cents) of sending a package weighing w ounces (w > 10) by special delivery?

  1. x + (w - 10)y = 10

  2. x + (w - 10) + y

  3. 10x + 10(w - y)

  4. 10x + y(w - 10)

  5. 10x + wy

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The cost for the first 10 ounces is 10x cents, and the cost for the next (w - 10) ounces is y(w - 10) cents. So, the total cost = 10x + y(w - 10) cents.