## anonymous one year ago what is the distance between (7,1) and (-4,-5)? A. 3 square root of 3 B. square root of 137 C. square root of 157 D. 5

1. Nnesha

$\huge\rm \sqrt{(x_2 -x_1)^2+(y_2 -y_1)^2}$ formula to find distance x and y values are $\huge\rm (x_1 ,y_1)(x_2 ,y_2)$ substitute x and y values :-)

2. anonymous

i got 5 is that wrong?

3. Nnesha

yes that's wrong how did you get 5 ?

4. anonymous

idk lol

5. Nnesha

just substitute numbers instead guessing :(

6. anonymous

i did. im honestly not sure how to do it. didnt really understand this lesson in class.

7. Nnesha

alright list x and y values x_1 = ? x_2 = ? y_1 =? y_2 = ?

8. anonymous

oh i got square root of 157 now. but what about the secound part how do i do that?

9. Nnesha

2nd part ?

10. anonymous

yea like how you had (x1,y1) and (x2,y2)

11. anonymous

or is that supposed to be the final answer?

12. Nnesha

x and y values are in order pair x_1 meaning first x X_2 2nd x

13. Nnesha

|dw:1433633191206:dw|

14. anonymous

yea thats what i did and got sqaure root of 157

15. Nnesha

okay.

16. anonymous

oh my bad that was the first part i got 157 but idk what you are doing in that secound part? is that the answer or do i do more and get another answer?

17. Nnesha

how did you get 157 ?

18. Nnesha

square root of 157***?

19. anonymous

|dw:1433633369848:dw|

20. Nnesha

yep right that's it factor of 157 is just one so final answer is square root of 157 :-) nice

21. Nnesha

wait

22. anonymous

okay thankyou

23. anonymous

its not right?

24. Nnesha

|dw:1433633599820:dw| -5-1 it's not -5--1 bec negative times negative = positive so it becomes -5+1 which is not correct

25. Nnesha

|dw:1433633663476:dw|

26. anonymous

okay thankyou

27. Nnesha

np