## anonymous one year ago .

1. Vocaloid

1/15 + 1/x = 1/20 start by multiplying both sides by 60

2. anonymous

4+60=3?

3. anonymous

@Vocaloid

4. Vocaloid

don't forget the x

5. anonymous

4+60x=3?

6. Vocaloid

(whoops, I forgot a negative sign) should be 1/15 - 1/x = 1/20 which gives us 4 - 60/x = 3

7. anonymous

-60/x=-1?

8. Vocaloid

yes

9. Vocaloid

now multiply both sides by x

10. anonymous

-60=-1x

11. Vocaloid

good, so x = ?

12. anonymous

60?

13. Vocaloid

right, so x = 60 minutes

14. anonymous

one more?

15. Vocaloid

sure

16. anonymous

Byron can fill a drying rack with dishes in 15 minutes. While Byron fills the drying rack, Emmitt takes dishes out of the drying rack and puts them in bins. With Emmitt taking dishes out of the drying rack, it takes 35 minutes for Byron to fill the drying rack. Which of the following can be used to determine the amount of time it takes for Emmitt to empty the drying rack if Byron is not adding dishes? 1 over 15 plus 1 over 35 equals 1 over x 1 over 15 minus 1 over x equals 1 over 35 1 over 35 minus 1 over x equals 1 over 15 1 over 15 minus 1 over x equals x over 35

17. anonymous

vocaloid?

18. Vocaloid

1/15 - 1/x = 1/35 same rule as last time

19. Vocaloid

we don't actually need to solve for x this time ofc

20. anonymous

B?

21. anonymous

B right?

22. Vocaloid

yes

23. anonymous

thx i got a 100

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