exam Maths Puzzle Numerical Ability

~So for this question, I have to prove line segment WA is congruent to line segment LK.

~The figure is a Parallelogram. Angle W is in the top-left corner, angle K is in the top

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exam Other Question

What is the equation for the line that passes through the point (0,4) with a slope of -2? Thanks.
please simplify:

4 over ax+ay-bx-by minus 3 over a-b...all of this OVER

2 over a-b plus 2 over x^2 + xy

so it should look like:

4.....................3
-------- minus