Question

You have a $20 phone card. Calls made using the card cost $.03 per minute to destinations in the United States and $.06 per minute to destinations in Brazil. Write an inequality describing the numbers of minutes you can use for calls to the U.S. and Brazil.

Answer 1

Answer: .03x + .06y ≤ 20

Explanation:

Let x represent the number of minutes to the US and

let y represent the number of minutes to Brazil

and make sure their sum is not greater than $20

.03x + .06y ≤ 20