Find the coordinates of A if M (-1,2) is the midpoint of AB and if B has coordinates of (3,-5)

Hey there! I'm happy to help!

To find the x value of the midpoint, you add the x values and divide by 2.  However, we already have the midpoint, so we will go backwards by multiplying the x value of our midpoint and subtracting the x value from B to find the x value of A.

-1(2)=-2

-2-3=-5

Now we do the same with the y-values.

2(2)=4

4-(-5)=4+5=9

So, the coordinates of A are (-5,9).

Have a wonderful day! :D

graph them on a graphing calculator, press 2nd trace. select intersect. hit enter until it says answer. ti 84 works best

step-by-step explanation: