exam Maths Puzzle Numerical Ability

Determine whether the three points are the vertices of a right triangle:

1) M(-6;-4); N(0;-2); Q(-10; 8)

2) M(-4;1); N(1;4); Q(-6;-1)

3) M(-4;3); N(2;5); Q(-1;-6)

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exam Other Question

I am a little confused here! Can you help me with this question on exponent rules? (-2xy^-3)^-3 over (xy^-1)^-1 Given y = 2x^2 - 4X, thanks.

A) find the y-intercept
b) Find the X-intercepts (if any).
c) find the vertex.
d) Sketch the parabola