courtroul2483 courtroul2483
  • 10-09-2020
  • Mathematics
contestada

the midpoint of AB is M(1,3).if the coordinates of A are(-1,5),what are the coordinates of B

Respuesta :

adhikariaiso123
adhikariaiso123 adhikariaiso123
  • 11-09-2020

Answer:

(3,1)

Step-by-step explanation:

let B be (x,y)

m(1,3)=midpoint

A(-1,5)=(x1,y1)

B(x,y)=(x2,y2)

(1,3)= x1+x2/2          y1+y2/2

(1,3)= -1+x/2           5+y/2

so,

-1+x/2=1              5+y/2=3

-1+x=2                 5+y=6

x=3                      y=1

therefore the co ordinates of B(x,y) are (3,1)

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