exam Maths Puzzle Numerical Ability

Factor Completely

-4b^2-3b+10

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exam Other Question

I need help simplifing radicals, the problem says to express in simpliest radical form: radical 3x/2y by boat, joseph can go 72km upstream to a fishing hole in 4 hours. to go back, he needs only 3 hours. what is his rate upstream and his rate downstream?