Question and answer
Solve x 2 + 2x - 1 = 0
Question
Asked 3/31/2014 6:08:03 AM
Updated 4/21/2014 9:22:43 PM
2 Answers/Comments
This conversation has been flagged as incorrect.
Flagged by yeswey [4/21/2014 9:16:02 PM]
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User: Solve x 2 + 2x - 1 = 0

Weegy: (x) = 4^2x - 100 when x = 2

f(x) = 4^2(2) - 100

f(x) = 16(2) - 100

f(x) = 32 - 100

f(x) = -68

User: What type of conic section is the following equation? 9x2 + 4y2 - 36 = 0 parabola, circle, hyperbola, ellipse

Question
Asked 3/31/2014 6:08:03 AM
Updated 4/21/2014 9:22:43 PM
2 Answers/Comments
This conversation has been flagged as incorrect.
Flagged by yeswey [4/21/2014 9:16:02 PM]
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3
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]
3
9x^2 + 4y^2 - 36 = 0
9x^2 + 4y^2 = 36
x^2/4 + y^2/9 = 1
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]
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Question
Updated 3/26/2014 7:34:51 AM
1 Answer/Comment
The slope of the line passing through the points (-5, 7) and (-3, 5) is -1.

Added 3/26/2014 7:34:51 AM
This answer has been confirmed as correct and helpful.
Confirmed by yumdrea [8/7/2014 11:11:39 AM]
Select the conic section that represents the equation. 20x = 4y 2 parabola, circle, hyperbola, ellipse
Question
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
Weegy: The simpified equation is (B) 6x+ 7. (More)
Question
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]
If f = {(-1, 0), (-2, 2), (-3, 4), (-4, 6), (-5, 8)}, what is the range? {-1, -2, -3, -4, -5}, integers, even numbers, {0, 2, 4, 6, 8}
Weegy: The range is {1, 2, 3, 4, 5}. User: Evaluate P(7, 3). 840, 35, 15,120, 210 (More)
Question
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]
Find the equation for the line containing the points (-2, -5) and (6, 3). y = 2x - 3, y = -2x - 3, y = x + 3, y = x - 3
Weegy: A. y = -2x - 3. The equation of the line through (1, -5) with slope -2 is y = -2x - 3 User: In a prize drawing at a fundraiser, you choose three different numbers from 1 to 8. How many ways are there to choose three numbers? 512, 336, 56, 6,720 (More)
Question
Not Answered
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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