exam Maths Puzzle Numerical Ability

y/5 + 4 = 40.5?

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exam Other Question

I am not understanding how to work this problem out.

Area of a Parallelogram. Find a trinomial that represents the area of a parallelogram whose base is 2x + 3 meters. Walking on a tread mill for 20 minutes per mile, how fast does it have to be to burn 217 calories?