Question

plz solve this question fast

Answer 1

Hello Mate

Answer,

(a,b) are the midpoint, so the formula is x1 +x2/2

The points are A(10,-6) B(K,4)

Apply the midpoint formula

10 + k/2 and -6 +4/2

10 + k /2 and -2/2

10 + k /2 and -1

a= 10 + k/2 and b= -1

given that a- 2b = 18

10 + k/2 - 2(-1) = 18

10 + k/2 +2*2 = 18

10 +k +4/2 = 18

10 +k/2 = 14

10 + k = 28

k= 28 - 10

k= 18