Question

Monica has $20. She needs to buy a gallon of milk that costs $2.50. She also wants to buy yogurt, which costs $1.20 a cup. Which inequality can you use to find the number of cups of yogurt Monica can buy?

Answer 1

1.20x + 2.5 ≤ 20

Explanation:

This would be the best inequality to use.

How much Cups She Can Buy

x is the ammount of cups so we will solve for x

Subtract 2.5 from both sides

1.20x + 2.5 -2.5 ≤ 20 - 2.5.

1.20x ≤ 17.5

Divide both sides by 1.20

1.20x/1.20 ≤ 17.5/1.20

x ≤ 14.5833...

She can buy 14 cups

Answer 2

Explanation:

Step 1: Make an equation

20 ≥ 2.50 + 1.20x ← Best inequality

Step 2: Subtract 2.50 from both sides

20 - 2.50 ≥ 2.50 - 2.50 + 1.20x

17.5 ≥ 1.20x

Step 3: Divide both sides by 1.20

17.5 / 1.20 ≥ 1.20x / 1.20

14.583... ≥ x

Answer: The max amount of full yogurts that she can buy is 14