Question

The midpoint of rectangle PTQW is (-0.5,6). The coordinates of P are (-3.5,6). What are the coordinates of Q?

Answer 1

let the other end point be (x,y)
so (x-3.5)/2 = -.5
x-3.5 = -1
x = 2.5

(y+6)/2 = 6
y+6 = 12
y = 6

other point is (2.5 , 6)

Answer 2

Thanks so much.....ur rite!

Answer 3

Ok, one more question. U see when u have (x-3.5)/2 = -.5
x-3.5 = -1 (how did u get -1)

Answer 4

@enno , there is -1 because :

we had : (x-3.5)/2 = -.5

multiplying 2 both sides

(x-3.5)/2 *2 = -.5 *2

x-3.5 = -1

and then you can proceed easily.

if a/b = c

then a = bc

I hope it helped u though I helped u 1 year later :P