this is a past paper examination question, please help me solve it.?
139303
the physics formula that can be applied here is:\n\nvt = x, where v = speed tub is being filled, t = minutes, x = number of tubs filled.\n\nsince there are three valves, each contributes to the filling/emptying of the tub.  thus, v = valve1 + valve2+ valve3.\n\nt is unknown, the minutes we are solving for.\n\nx = 1, since we want the time that it takes to fill 1 tub, no more.  putting these all into the equation:\n\n[valve1 + valve2 + valve3]t = 1 tub\n\n[(1/3)tub/min. + (1/5)tub/min. - (2/15)tub/min.]t = 1 tub\n\n[(2/5)tub/min.]t = 1 tub\n\nt = (5/2)min. = 2.5 minutes\n\nchecking the answer, in 2.5 minutes, valve 1 will fill the tub 5/6 of the way, valve 2 will fill it 1/2 of the way, and valve 3 will empty it 1/3 of the way.  (5/6) + (1/2) - (1/3) = 1, therefore our answer works!\n\nt = 2.5min.
635806
Sounds like an essay.\n\nDo your own homework.
191211
Do your own homework.\n\nIt's pretty bad when you don't even try to hide it.
167792
Question has very little info. Give the context/ sentence/ paper/ text, where it was used.
517123
It's hard to show it clearly here but the solution is actually:\n\n[-b±√(b²-4ac)]/2a\n\nthere will usually be two solutions!\nThe site below has it laid out more clearly...\n\n("invited" to leave school early.. 1974)
917250
I'm going off memory here so be sure to check this.  I think the formula is the same, but the structure may be different.  Just trying to point you in the right direction.
761332
I've found this question with no answers after three days.  I cannot answer it; only someone with a very specialised  background could.\n\nYou will have to place it again - at peak time for prospective Answerers with the requisite background.
70018
Do your own homework.  If you read your assignments you'll be able to answer this question.
368676
I see someone gave you the answer. Give Al the points! =-)
998992
You should do your own homework.\nIt's B.
355476
here's a tip. p*p = p^2\n\nnow do your own homework. How do you expect to pass the test?! Y!A won't be there for you then.
784392
Here is what i found.  I'm not sure how right this is, but you can check it out.  Good Luck with your testing.
457702
I think you need to start doing your own homework because I've checked through your question log and you've posted a question like this three times.  Get off your butt and do your own work.
120086
(b-3a)(b+2a)\n\nk skippy you should be able to do your own homework now :)
735406
Hint: the three side are equal long.\n\nTh
575536
Here is a great article with sample problems.\n\nHope this helps!
122160
Are you sure it's not in your textbook? \n\nPlease do your homework. \n\nSee below...