exam Maths Puzzle Numerical Ability

A random sample of 30 executives from companies with assets over $1 million was selected and asked for their annual income and level of education. The ANOVA comparing the average

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How do I expand the following to include all stages:
2
(x+2)(x + 7)

Hope you can help me.
M is the midpoint between P(a,b) to Q(h,k). What are the coordinates of M( , )?