exam Maths Puzzle Numerical Ability

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sqrt -x +7 = x-1=6x

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exam Other Question

ok im completely lost! were talking about angle side angle, angle angle side, and so on..well i get confused about the prof part. can you please help me!!! A motorboat has a four-hour supply of gasoline. How far from the marina can it travel if the rate going out against the current is 20mi/h and the rate the rate coming back with the current is 30mi/h?