Math will give ! what are the coordinates of the midpoint of ab¯¯¯¯¯ where a(−7, 2) and b(5, −9)? (−2.5, −1) (−1, −3.5) (1, −9) (−6, −5.5)

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0