Question

Angelina is painting her room. She wants a very specific shade of bright blue paint, so she mixes blue and green paint in a ratio of 2:1. If she needs 6 gallons of paint, how many gallons of blue paint should she buy?

15 points

Answer 1

Answer: 4 gallons

Step-by-step explanation: A ratio of 2:1 can mean

2 gallons of blue : 1 gallon of green which equals

4 gallons of blue : 2 gallons of green since this is just the first ratio multiplied by 2.

4 gallons + 2 gallons = 6 gallons, so Angelina will need 4 gallons of blue paint.

Answer 2

4 gallons

Explanation:

6 gallons of paint means she needs 2 gallons of blue paint per 1 gallon of green paint.

To make the proper mixture, you need 3 gallons with 2 blue and 1 green. This means you do 6/3=2. You can make 2 total mixtures.

Multiply 2 blue by the 2 mixtures we need to make. You get 4 gallons of blue paint.

Multiply 1 green by the 2 mixtures we need to make. You get 2 gallons of green paint.

Check your work:

4+2=6

4/2=2:1