In a bag there are red and blue balls in the ratio of 2: 7. if there are 14 red balls, find the number of blue balls in the bag. use a tape diagram to solve the problem.

2/7 = x/14

to get from 7 to 14 you multiply by 2

since you have to multiply both the numerator and denomenator by 2, 2/7=4/14

so you have 4 blue balls/14 red balls

hope this helps

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