Question

if (1,5) is the midpoint of the line joining (-5,3) and (7,k) then k

Answer 1

Answer:

for midpoint 5=y1+y2 / 2

3+k/2=5

3+k=10

k=7

Answer 2

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A(-5,3)------------------P(1,5)------------------B(7,k)

P (1 , 5) = (-5 +7/2) , (3 +k/2)

5 = 3 + k/2

5 × 2 = 3 + k

10 - 3 = k

k = 7

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