book Maths Puzzle Numerical Ability

find the gcf of (6y^2 - 3y) (y + 7)

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book Other Question

How many liters of 37 percent alcohol solution should a chemist mix with 20 liters of 16 percent alcohol solution to get 25% solution? You need to attach the unit L to your answer. choose a scale that you could use to graph each table....

x y

-5 10
2 -6
6 -15
13 -23

need help fast!!