Answer:
Increase Percentage =

Percentage increase in hairlength = 72%
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Set the expressions equal to each other to get 17
Answer:
Given,
2 cups of yellow paint is needed for every 3 cups of red paint to make a batch of orange paint,
So, the ratio of yellow paint and red paint in a batch of orange paint = 2 : 3
Make two number lines,
First one represents the multiple of 2 and second one represents the multiples of 3,
By the double number line ( shown below ),
It is clear that,
For 3 batches of orange paint, 6 cups of yellow paint and 9 cups of red paint are needed.
4 1/3, 4 1/2, 4 5/6, 5 1/6, 5 2/3, 5 6/6