exam Maths Puzzle Numerical Ability

I am supposed to write the equation of the line.

Through (3,2) with a slope of 2

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exam Other Question

I need help in answering,what is [x+y4] for x =4 and y = 8 the answer I got was 3 is that right. the 4 belongs under the x+y factor this

15x^2-13xy+2y^2