exam Maths Puzzle Numerical Ability

Express as a Polynomial:

((x^-xy)/2x)(2x+6y)

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exam Other Question

I need to prove that verticle angles are congruent.

They gave me a diagram that shows 2 intersecting lines .
the < on the left it labeled 1
the < on the right is labeled 3.
and the < on the top is labeled 2. Can you help me with this equation?

Find the average of three test scores if the first two test scores are 80 and 84. Express your answer in terms of s, the third test score