exam Maths Puzzle Numerical Ability

M is the midpoint of QR. Q has coodinates (-3,5) and M has coordinates (7,-9) find the coordinates of R.

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exam Other Question

Can you please explain to me step by step how this type of problem is solved.

For f(x) = 2x - 11, find f(2).

I greatly appreciate any help!
Thank you
Patti Show me how to graph y=x^2+5x+3