exam Maths Puzzle Numerical Ability

1/a - 3 - 1/a + 3 + 2a/ a^2 - 9

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exam Other Question

How far does a bus travel going 90km/h in 20minutes? Could I please have some help on a systems of equations problem? This one needs to be solved by the Graphing method.

3x + y = -6
x + y = -4

Thank you in advance for all your time,and help. Elle J