exam Maths Puzzle Numerical Ability

what is -2 over 3a^2b plus 5 ab^2 simplified?

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exam Other Question

I really need to check my answer:

graph the rational function

f(x)= ^x^2/x^2-x-12

The whole equation is above the equal sign

Thank you for your help For the following set of data, test the hypothesis that the average is 10. Run a test of that hypothesis and present the conclusion.
x
8.9
9.7
10.3
8.5
10.4
9.3
9.8
7.1
10.6
11.1