exam Maths Puzzle Numerical Ability

simplify:
-3(-7/4a+1/6)+5/2(3-a/2)

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exam Other Question

I am so confused by this problem! I need your help! :(

Find the equation of the ellipse whose center is (1,-5), has a vertex at (3,5) and a minor axis of length 4. 5W + 4L = 198cm