A= The difference in x-values.

B= The difference in y-values.

C= The distance between the two points.

So, (-4-1)^2 + (9-(-3))^2 = C^2

25 + 144 = C^2

169 = C^2

13 = C

To find the mid-point find the average.

(-4+1)/2 and (9+-3)/2 so the mid-point is. (-1.5,3)

Hope this helps, Twiggy.

m= X1+X2/2 and

m= Y1+Y2/2

you just have to substitute the given coordinates in that fromula to get the midpoint. For example,

solve for the midpoint of point X:

m= -4 + 1/2

m= -3/2 (this is already simplified so this is the final answer)

solve for the midpoint of point Y:

m= 9 + (-3)/2

m= 9 – 3/2

m= 6/2

m=3

*solving for the distance, you can use ths formula:

d= square root of (x2- x1)^2 + (y2- y1)^2

you just have to substitute the given coordinates in the given formula.

hope this will help.