Question and answer
The volume of a box (V) varies directly with its length (l). If the box has a length of 10 inches and k = 28, what is its volume? 140, 2.8, 560, 280
The volume of a box (V) varies directly with its length (l), and k = 28, the equation is V = 28l When the length l = 10 inches, V = 28(10) = 280
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Asked 4/3/2014 6:49:15 AM
Updated 4/13/2014 10:39:13 PM
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The volume of a box (V) varies directly with its length (l), and k = 28, the equation is V = 28l
When the length l = 10 inches, V = 28(10) = 280
Added 4/13/2014 10:39:13 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [4/13/2014 10:47:06 PM]
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Solve x 2 + 2x - 1 = 0
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Updated 4/21/2014 9:22:43 PM
2 Answers/Comments
x^2 + 2x - 1 = 0
a = 1, b = 2, c = -1
b^2 - 4ac = 2^2 - 4(1)(-1) = 8
x = [-2 ± sqrt(8)]/2
= -1 ± sqrt(2)
The solution for the equation x^2 + 2x - 1 = 0 is x = -1 + sqrt(2) or x = -1 - sqrt(2)
Added 4/21/2014 9:19:47 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [4/21/2014 9:21:29 PM]
9x^2 + 4y^2 - 36 = 0
9x^2 + 4y^2 = 36
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The type of conic section for the equation 9x^2 + 4y^2 - 36 = 0 is ellipse.
Added 4/21/2014 9:22:43 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [4/21/2014 9:37:47 PM]
Select the conic section that represents the equation. 20x = 4y 2 parabola, circle, hyperbola, ellipse
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Not Answered
Updated 4/21/2014 8:43:04 PM
1 Answer/Comment
The conic section that represents the equation 20x = 4y^2 is: Parabola.
Added 4/21/2014 8:43:04 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [4/21/2014 8:50:56 PM]
Find the sum and product of the roots. 2x 2 + 6x - 8 = 0
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Expert Answered
Updated 4/3/2014 7:32:32 AM
1 Answer/Comment
2x^2 + 6x - 8 = 0
2(x^2 + 3x - 4) = 0
2(x + 4)(x - 1) = 0
x = -4 or 1
The sum of the roots = -4 + 1 = -3
The product of the roots = (-4)(1) = -4
Added 4/3/2014 7:32:32 AM
This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [4/3/2014 7:35:48 AM]
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Weegy: The range is {1, 2, 3, 4, 5}. User: Evaluate P(7, 3). 840, 35, 15,120, 210 (More)
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Updated 4/3/2014 8:27:24 PM
1 Answer/Comment
P(7, 3) = 7!/(7 - 3)! = 7!/4! = 7 x 6 x 5 = 210
Added 4/3/2014 8:27:24 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [4/3/2014 8:39:19 PM]
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Updated 4/3/2014 7:16:35 AM
1 Answer/Comment
The equation for the line containing the points (-2, -5) and (6, 3) is y = x - 3
Added 4/3/2014 7:16:35 AM
This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [4/4/2014 1:40:58 PM]
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