Given one endpoint X (-2,7) AND M (3,7) Find Ythe other endpoint. Pleaseee helpp :

Question

Given one endpoint X (-2,7)  AND M (3,7) Find Ythe other endpoint. Pleaseee helpp :>

campbell_st · Answer

M is a midpoint then 

3 = (-2 + x)/2                                  7 =(7 + y)/2

solve for x and y

6 = -2 + x                                       14 = 7 + y

I'll let you finish

anonymous · Answer

I dont see what to do next @campbell_st

campbell_st · Answer

6 = -2 + x                                14 = 7 + y

add 2 to both sides                   subtract 7 from both sides

8 = x                                         7 = y

the endpoint is (8, 7)

anonymous · Answer

If thats your answer , it isnt correct . not one of the answer choices .

campbell_st · Answer

Is M the midpoint..?

anonymous · Answer

i dont think so , i think its just a letter given .

anonymous · Answer

@Limitless  heyy . do you think you know his mistake in this one?

campbell_st · Answer

If M isn't a midpoint... and you have no other information about M... you can't find the point Y

anonymous · Answer

I believe $(3,7)$ has to be the midpoint. Otherwise there is not a sensible question here.

anonymous · Answer

this is a practice question given from the school

anonymous · Answer

$$\text{mid}(A,B)=\left(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2}\right)$$
So,
$$(3,7)=\left(\frac{-2+x_2}{2}, \frac{7+y_2}{2}\right)$$
Can you solve from here?

anonymous · Answer

@campbell_st is correct, it seems.

anonymous · Answer

the answer choice tht i was going with was (-8,-1) ?

campbell_st · Answer

what solutions were you given...?
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