exam Maths Puzzle Numerical Ability

Find the distance between the lines with the following equations.

3x-y+4=0 and 3x-y=0

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exam Other Question

3m^2 + 8m + 2 =0 How many gallons of cream that is 22% butterfat must be mixed with milk that is 2% buttermilk to get 20 gallons of milk containing 4% buttermilk?