## KiArUnsYu 2 years ago What is the distance between points (12, 4) and (18, –1)? Round to the nearest tenth. 7.8 6.1 4.7 9.9

1. hartnn

Distance between points (x1,y1) and (x2,y2) is $$\huge d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}$$

2. hartnn

can you find 'd' now ?

3. KiArUnsYu

yes. thanks.

4. hartnn

welcome ^_^ if you want to verify your answer, post it...i'll verify for u.

5. KiArUnsYu

okay.

6. KiArUnsYu

i got $\sqrt{-23}$

7. hartnn

how ? that isn't correct..

8. KiArUnsYu

IM SO CONFUSED.

9. hartnn

ok, so we have $$\huge d=\sqrt{(12-18)^2+(4-(-1))^2}$$ right? lets go step by step what is 12-18 =.... ?

10. KiArUnsYu

-6

11. hartnn

correct, and $$(-6)^2 =$$

12. KiArUnsYu

-32

13. KiArUnsYu

NO 32.

14. hartnn

? how ? 6*6 =.... ? its not 32

15. KiArUnsYu

I MEANT 36

16. hartnn

then you are correct!

17. KiArUnsYu

sorry

18. hartnn

now whats 4-(-1) =.. ?

19. KiArUnsYu

5

20. hartnn

good! and 5^2 =.. ?

21. KiArUnsYu

25.

22. KiArUnsYu

OKAY I SEE WHERE I MESSED UP!!

23. hartnn

so you have $$\sqrt {36+25}=..?$$

24. hartnn

good :) so tell me now what u get...

25. KiArUnsYu

7.8

26. hartnn

$$\checkmark$$

27. KiArUnsYu

:D THANKS!!

28. KiArUnsYu

could you help me with one more?

29. hartnn

sure! post it.