exam Maths Puzzle Numerical Ability

Make a table and graph x+y=1.

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exam Other Question

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 It has been along time since I dealt with these. But I need your help.

Find the additive and multiplicative inverses of each of the following:
a) 3
b) -2/3
c) 2.5 X 10^-3