Find the midpoint of ab if a is (-3,-3) and b is (6,6)?

(x, y)

When you are asked for the midpoint, just find the average for both the x and y components:

So the midpoint for A(-3, -3) and B(6, 6) 

The xs components are  -3, and 6,  Average = (-3 + 6)/2 = 3/2 = 1.5

The ys components are  -3, and 6,  Average = (-3 + 6)/2 = 3/2 = 1.5

So the midpoint is (1.5, 1.5)

I hope this helps.

Yes you do, so £1973.09 - £1473.50 = £499.59 so tim overpaid £499.59 .hope this ; )