timia618 Group Title Pump 1 can empty a pool in 9 hours while Pump 2 can empty the same pool in 12 hours. If the two pumps worked together, how long would it take them to empty the pool? one year ago one year ago

1. timia618 Group Title

Solve the following inequality: 2x + 6 ≤ 5x - 9

2. estudier Group Title

Pump 1 does 1/9 per hour and Pump 2 does 1/12 per hour

3. timia618 Group Title

how many hours then together?

4. estudier Group Title

Work out how much the two are doing per hour together and u can easily get your answer...

5. timia618 Group Title

6. Algebraic! Group Title

$\frac{ 1pool }{ 9 hours }*T hours + \frac{ 1pool }{ 12 hours}*Thours = 1 pool$ t/9 + t/12 =1

7. Algebraic! Group Title

solve for t

8. timia618 Group Title

5 hours?

9. Algebraic! Group Title

you solved for t and got t=5?

10. timia618 Group Title

idk

11. timia618 Group Title

how do i get the t?

12. Algebraic! Group Title

multiply the whole equation by (9*12)

13. timia618 Group Title

108

14. Algebraic! Group Title

yes, multiply the whole equation by 108

15. Algebraic! Group Title

it will be easier for you if you leave 108 as 9*12 , but do it however you like...

16. timia618 Group Title

so the answerr is 5hr and 30mns

17. Algebraic! Group Title

what did you get for t?

18. timia618 Group Title

A plane traveling from Dallas to New York with a tailwind of 30 miles per hour takes 4.5 hours. Returning with the headwind, it takes the same plane 5 hours. What is the average speed of the plane in calm conditions? A plane traveling from Dallas to New York with a tailwind of 30 miles per hour takes 4.5 hours. Returning with the headwind, it takes the same plane 5 hours. What is the average speed of the plane in calm conditions?

19. satellite73 Group Title

go right to the answer, no agony $\frac{9\times 12}{9+12}$

20. timia618 Group Title

so its 9

21. satellite73 Group Title

i seriously doubt $\frac{9\times 12}{9+12}=9$

22. timia618 Group Title

i got 5.1428567143

23. timia618 Group Title