Question

M (18, 24) is the midpoint of segment JL with J (- 4, - 2). What are the coordinates for L?

Answer 1

mid point (x,y) = M (18, 24)

let J (- 4, - 2) be ( x1, y1)

L(a,b) be (x2,y2)

using midpoint formula

(x,y) = [(x1+x2)/2, (y1 + y2)/2]

or, (18, 24) = [(-4+a)/2, (-2+b)/2]

comparing corresponding element we get

18 = (-4+a)/2 24 =(-2+b)/2

or 36 = -4+ a or 48 = -2 +b

or a = 40 or b= 50

L(40,50)