exam Maths Puzzle Numerical Ability

Add 8a - 6 and 4a + 5.

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exam Other Question

Help! I am stuck on an equation. I need to factor:

4y squared + 7y - 2

I amd just really stuck with how to do this. Even anyone could show me the proper way to factor I would be very grateful.

Thank you. The shorter parallel side of a trapezoid is equal to its height and the longer side is 3/2 times as long. If the area is 80, find the lengh of the shorter side.