exam Maths Puzzle Numerical Ability

Factor completly
5x^2-5xy-10x+10y

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exam Other Question

Solve the following equation for the unknown:

1) 6.2(x - 15.1) = 9.3(-x - 3.2) One type of gasohol is 10% alcohol and another type is 35% alcohol. How much of each type must be mixed to obtain 400 gallons of a 25% alcohol mixture?