Xis the midpoint of ab. b has coordinates (12,−7), and x has coordinates (3,−1). identify the coordinates of a.

Count the distance in x and y separately from B to X

12 -> 3 = 9 (subtracted) , -7 -> -1 = 6 (added).

X is midpnt, so if we go from B to X, we must go from X to get A.

subtract another 9 from the x value, and add another 6 to the y value of X

That gives us -6, 5, which are the coordinates of A.

45

step-by-step explanation:

30+15

3,000,540

step-by-step explanation: