Pls Pls help me!! Mark the points P (3,5) and Q (3,9) Join P and Q and mark the point R which is the midpoint of PQ. Write down the coordinates of R.

Help me plsss.
I really need it!

What values of c and d make the equation true?

Find the average rate of change for f(x) = x2 − 3x − 10 from x = −5 to x = 10.

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?