Find the midpoint segment that joins the given points:

Question

anonymous · Answer

(a, 4) and (a + 2, 0)

anonymous · Answer

I dont know how to do it.  I would know if it had only numbers but since those variables are there i dont know what to do...

anonymous · Answer

are you sure they don't give you the midpoint already and you are to solve for the variables?

anonymous · Answer

No thats all they give me.  I dont understand.  Would it be (?, 2)

anonymous · Answer

You have to find the average of x1 and x2, and then the same for y1 and y2.  Then you add the averages for each coordinate. I probably said that wrong but i know how to do it if there is only numbers.

anonymous · Answer

to find the midpoint given two points, $$(x _{1},y _{1}) and (x _{2},y _{2})$$
$$M(\frac{ x _{1} +x _{2}}{ 2 },\frac{ y _{1}+y _{2} }{ 2 })$$

anonymous · Answer

Yeah i know that.  But what is the average of a and 2a?

anonymous · Answer

or instead of 2a would it be aa?

anonymous · Answer

lets start of by using the midpoint formula: $$((x1+x2)\div2),((y1+y2)\div2))$$

anonymous · Answer

the average is going to be $$(y2-y1)\div(x2-x1)$$

anonymous · Answer

|dw:1366490592027:dw|

anonymous · Answer

i think you add, not subtraction.

anonymous · Answer

work out the average between THAT point and the SECOND point you posted

anonymous · Answer

|dw:1366490602978:dw|
|dw:1366490721666:dw|