## anonymous 3 years ago MEDALLLLLLLLLSSSSSSSSSSSSSSSSSSSSSSSSSSSS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Find the coordinates of the midpoint between point A(18, -6) and the origin. Answer Skip text editor options

1. jdoe0001

$$\bf \begin{array}{lllll} &x_1&y_1&x_2&y_2\\ &(18\quad ,&-6)\quad &(0\quad ,&0) \end{array}\\ \quad \\ \text{middle point of 2 points }\\ \left(\cfrac{x_2 + x_1}{2}\quad ,\quad \cfrac{y_2 + y_1}{2} \right)$$

2. anonymous

wait do do I do next. I got 9,-6/2

3. jdoe0001

$$\bf \begin{array}{lllll} &x_1&y_1&x_2&y_2\\ &(18\quad ,&-6)\quad &(0\quad ,&0) \end{array}\\ \quad \\ \text{middle point of 2 points }\\ \left(\cfrac{x_2 + x_1}{2}\quad ,\quad \cfrac{y_2 + y_1}{2} \right)\implies \left(\cfrac{18}{2}\quad ,\quad \cfrac{-6}{2} \right)\implies (9,-3)$$ thus ( 9, -3 ) is the coordinates of the middle point of A and the origin (0,0)

4. anonymous

oh thanks you I didn't know what I did wrong, haha your the best

5. jdoe0001

6. anonymous

how did you do that

7. jdoe0001

? what do you mean?

8. anonymous

nvm thanks you

9. jdoe0001

yw

10. anonymous

wait can you help me with something else, it the same

11. jdoe0001

ok

12. anonymous

yea!!! ok. Find the coordinates of the midpoint of if A(-8, 7) and B(-9, 11).

13. jdoe0001

$$\bf \begin{array}{lllll} &x_1&y_1&x_2&y_2\\ &(-8\quad ,&7)\quad &(-9\quad ,&11) \end{array}\\ \quad \\ \text{middle point of 2 points }\\ \left(\cfrac{x_2 + x_1}{2}\quad ,\quad \cfrac{y_2 + y_1}{2} \right)\implies \left(\cfrac{-9+(-8)}{2}\quad ,\quad \cfrac{11+7}{2} \right)$$

14. anonymous

thanks that all I need

15. jdoe0001

yw

16. anonymous

so its 8.5, 9 if I did it right

17. jdoe0001

-8.5, yes

18. anonymous

thanks again