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1. Can someone help with this profit and renevue ditto- it's 10th grade math (my brothers)??

a) -2.9 x^2+28.4x -40.2 =0 2.9x^2-28.4 x+40.2=0 29x^2 -284 x +402 =0 x= [142 +/- 92.22]/29 so x=[142 +92.22]/29 = 234.22 /29 =8.076 or x=(142-92.22)/29 =191.78 /29=6.61 so the company will start to gain profit in the 7th year ( the answer 6.61) and start to lose money ar 9th year (8.076 ) for the highest profit get p' (x)=0 & it...

3 Answers · Science & Mathematics · 11/12/2007

2. An old money weight question: how many pounds of feathers make up one stone, and ditto for lead?

Elio is correct in his explanation. 14 pounds = 1 stone. 14 pounds of feathers will equal 14 pounds of lead every time.

5 Answers · Science & Mathematics · 26/03/2009

3. Solve sqrt(3+ 2sqrt(5+ 12 sqrt(3+2sqrt(2)).?

Ditto Rita — missing rt. parens & nothing to "solve."...

2 Answers · Science & Mathematics · 19/03/2015

4. Help solving this exponential equation?

3ˣ = x5ˣ . . . . . .  Ditto Mathmom — the only reason to pay attention to anonymous' answer, is...

3 Answers · Science & Mathematics · 01/11/2015

5. How is ABC = AB(C union B) equal? ?

Ditto on the we-need-more-information comment. AB(C U B) = ...

3 Answers · Science & Mathematics · 14/10/2008

6. Is full of the Calculus topics or calculus over till Graduation 3rd year if we take Mathematics in Calculus?

Ditto on the other two answers, for your subject. To your...

3 Answers · Science & Mathematics · 19/07/2009

7. how many days untill june 20th 2009?

Ditto what Geezah said, but with the additional + 20 at the end of his...

5 Answers · Science & Mathematics · 23/12/2008

8. Algebra ONE problem help.?

Ditto for Scott. But. . . remember that perpendicular lines have ...

2 Answers · Science & Mathematics · 08/11/2008

9. Math- need help on this?

Ditto. Composite #'s have more than 2 factors whereas Prime...

2 Answers · Science & Mathematics · 01/10/2009

10. Evaluate f(x) = -3x - 6 for x = 2?

Ditto Steve! lol it's fairly easy....just substitute (2) for x in the equation and solve! Steve beat me to it....darnit!

2 Answers · Science & Mathematics · 08/03/2011