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Q: A sporting goods store sells backpacks made of three different materials (canvas, nylon, or leather). Each backpack comes in one of three different colors (green, black, or blue). How many different
types of backpacks are there?A. 12B. 9C. 6D. 3?
A: The answer is B. 9
Expert answered|dennis003|Points 295|
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Asked 7/13/2012 6:53:15 PM
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Use the quadratic formula to solve the quadratic equation x2 - 8x - 4 = 0.
Weegy: ax^2 + bx + c. To solve this, you need to know the formula for a quadratic equation. This is -b + or - the square root of (b^2 - 4ac) ALL OVER 2a. [ From your equation you can see what a, b and c are based on the general form shown in the beginning of my explanation. So, a is 1, b is 8 and c is 12. Plug it into the latter formula to get....-8+or- square root of (8^2 - 4 (1)(12) ALL OVER 2(1). Now, just simplify to get -8 +or- sq rt (96) ALL OVER 2....simplify further to get your final answer. ] User: implify to get -8 +or- sq rt (96) ALL OVER 2 (More)
Question
Not Answered
Updated 3/29/2014 9:57:02 AM
1 Answer/Comment
x^2 - 8x - 4 = 0; a = 1, b = -8, c = -4
x = [-b +/- sqrt(b^2 - 4ac)]/2a
= [-(-8) +/- sqrt((-8)^2 - 4(1)(-4)]/2(1)
= (8 +/- 4 sqrt 5)/2
= 4 +/- 2 sqrt 5
Added 3/29/2014 9:56:57 AM
This answer has been confirmed as correct, not copied, and helpful.
Confirmed by andrewpallarca [3/29/2014 9:58:20 AM]
Simplify: ( y^-7 × y^-3 )^-1
Weegy: 6(y+7) = 0 then 6y+42 then 6y= -42 then y =-7 User: What is the mean of this data? 17, 34, 19, 27, 30, 23 (More)
Question
Expert Answered
Updated 9/24/2014 7:06:25 AM
2 Answers/Comments
( y^-7 × y^-3 )^-1
=(y^ -10 )^-1
= (1/y^10) ^-1
= y^10
Added 9/24/2014 7:04:43 AM
This answer has been confirmed as correct, not copied, and helpful.
Confirmed by andrewpallarca [9/24/2014 7:06:26 AM], Rated good by andrewpallarca
The mean of 17, 34, 19, 27, 30, 23 is 25 .
( 17+34+19+27+30+23)/6
= 150/6
=25
Added 9/24/2014 7:06:25 AM
This answer has been confirmed as correct, not copied, and helpful.
Confirmed by andrewpallarca [9/24/2014 7:09:47 AM]
What is the slope (m) and y-intercept of the line represented by the equation y = -9x - 6?
Weegy: y = -9x - 6, slope = -9, y-intercept = -6 (More)
Question
Expert Answered
Updated 7/10/2014 8:03:43 AM
0 Answers/Comments
What is the equation of the line, in point-slope form, that passes through the points (9, 1) and (4, 16) A. y + 1 = -3(x + 9)B. y - 1 = -3(x - 9)C. y + 1 = 3(x + 26)D. y - 1 = 3(x - 26)?
Question
Not Answered
Updated 9/24/2014 7:07:05 AM
2 Answers/Comments
y - 1 = -3(x - 9) is the equation of the line, in point-slope form, that passes through the points (9, 1) and (4, 16) .
the slope = (16-1)/ (4-9) = -3 , and then put (9,1) in y -1 = -3(x -9)
we can get the answer is correct .
Added 9/24/2014 7:01:49 AM
This answer has been confirmed as correct, not copied, and helpful.
Confirmed by andrewpallarca [9/24/2014 7:07:11 AM], Rated good by andrewpallarca
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