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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?
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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__________ is a time line that shows how conditions and organisms have changed on Earth. A. Geologic Time B. Periodic Time C. Geologic Time Scale D. Periodic Time Line?
Weegy: A. Geologic Time User: A(n) __________ is a fossil created when hard parts of an organism are replaced with minerals that turn to stone. A. cast fossil B. trace fossil C. petrified fossil D. imprint fossil? Weegy: B. trace fossil (More)
Question
Expert Answered
Asked 7/13/2012 9:35:39 AM
0 Answers/Comments
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]
If f(x) = x2 - 2x + 9 and g(x) = 8 - x, what is (f o g)(-4) A. 111B. 144C. 120D. 129?
Weegy: B. 144C. (More)
Question
Expert Answered
Asked 7/13/2012 12:45:56 PM
0 Answers/Comments
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: Write the equation of the line in point-slope form that passes through (1, -4) and has a slope of 1/4 User: What is the solution of this linear system?3x + 5y = -1 2x - 5y = 16 User: A school’s administrators are conducting a survey about which outdoor activities sixth-grade and seventh-grade students enjoy the most. The population is the 470 students in the sixth and seventh grades. What is an appropriate sample size for the population? A. 40B. 212C. 10D. 470 Weegy: No but some yes, depending on school some varies some are not. Compared in our school university before. As our college level increase the cost decreases for loyalty. (More)
Question
Expert Answered
Updated 9/24/2014 7:25:36 AM
3 Answers/Comments
x^2 - 8x - 4 = 0
x^2 - 8x + 16 - 16 - 4= 0
(x - 4)^2 = 20
x - 4 =±20^1/2
x = ±20^1/2 + 4
Added 9/24/2014 7:09:24 AM
The equation of the line in point-slope form that passes through (1, -4) and has a slope of 1/4 is y + 4 = 1/4(x - 1) .

Added 9/24/2014 7:11:55 AM
The solution of this linear system 3x + 5y = -1,2x - 5y = 16 is x = 3 , y = -2 .
Two equation add , we can get
3x + 5y + 2x -5y = -1 + 16
5x = 15
x = 3,
3x + 5y = -1
9 +5y = -1
5y = -10
y = -2
Added 9/24/2014 7:14:25 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]
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