## lyssa 3 years ago y varies inversely as twice x. When x = 2, y = 5. Find y when x = 10

1. myininaya

inversely think division directly think multiplication Your problem says inversely So you want to do division y=k/what?

2. myininaya

k is a constant by the way

3. myininaya

what goes in the denominator?

4. lyssa

I forgot the formula though

5. myininaya

what does twice x mean?

6. lyssa

two times X

7. myininaya

right so that part is the answer to my question

8. myininaya

$y=\frac{k}{2x}$

9. lyssa

What is K though?

10. myininaya

Now plug in 2 for x and 5 for y and solve for k This number k is a constant so what you get is what k will always be no matter what x and y are

11. lyssa

OH!! Ok thanks:D

12. myininaya

Feel free to let me know what you get for k And I will give you a thumbs up or a thumbs down k?

13. lyssa

K=20

14. myininaya

Brilliant! *puts thumbs up*

15. lyssa

How do I solve the other part where it say find Y when X=10 though

16. myininaya

So we have $y=\frac{20}{2x}$ Plug in x for 10 Simplify and evaluate to get y

17. myininaya

And you are done after that Congrats

18. lyssa

Y= 1

19. myininaya

yep

20. lyssa

YAY:D Thank you sooo much

21. myininaya

np