exam Maths Puzzle Numerical Ability

x-15=-3 (I have to find out what the x is)

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exam Other Question

Find the midpoint of the line segment from A(-2,9) to B(4,5). I plotted it out to be D(3,7) and would like to know if I was right or not. thanks for looking it over. I need help solving this type of problem, it says to factor: 9x^2-25. the answer I got was(5+3x)(-5+3x)I need to know if that is right and if not please show me the steps so that I can understand how to do these type problems.