Question and answer
What is the value of b^2 - 4ac for the following equation? x(x + 8) = 9
x(x + 8) = 9; x^2 + 8x = 9; x^2 + 8x - 9 = 0 The value of b^2 - 4ac or the discriminant is: (8)^2 - 4(1)(-9) = 64 + 36 = 100
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Asked 11/21/2014 10:13:16 PM
Updated 11/22/2014 2:00:25 AM
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This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [11/22/2014 2:00:25 AM]
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Find the product. (n 3)3 · (n 4)5
Weegy: your question? User: find the product (More)
Question
Updated 11/15/2014 3:55:18 AM
1 Answer/Comment
(n^3)^3 * (n^4)^5

= n^9 * n^20;

= n^29
Added 11/15/2014 3:22:11 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [11/15/2014 3:55:15 AM]
Find the seventh term of the following sequence? 1.5, 3, 6, ...
Question
Not Answered
Updated 11/16/2014 11:44:11 PM
1 Answer/Comment
The seventh term of the following sequence: 1.5, 3, 6, is 96.
common ratio = 6/3 = 3/1.5 = 2
7th term = 1.5*2^(7 - 1) = 1.5*2^6 = 1.5*64 = 96
Added 11/16/2014 11:44:11 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [11/17/2014 12:26:17 AM]
Which of the following constants can be added to x^2 - 6x to form a perfect square trinomial?
Weegy: The answer is 1/4. Here, I'll show you how to get that answer: Trial and Error Method: 1) 1/4, [ 1/2 and 1 are the possible answers in the choices but we know that 1/2 is not a perfect square so it's not possible for 1/2 to be the answer. 2) Now try 1/4 and 1 and add them to the equation to get: x2 - x + 1/4 x2 - x + 1 3)Use the perfect square formula if you can: x2 - x + 1/4 becomes (x-1/2)2? Yes! x2 - x + 1 becomes (x-1)2?...No! that's wrong because (a-b)2 = a2-2ab +b2 Thus, 1/4 is the answer. Easy Formula Method: 1) In a perfect square trinomial, c = (b/2a)2. a=1 because it's the co-efficient of x2 b=1 because it's the coefficient of x c=? and it's the missing constant using the formula and the given, c = 1/4. That's it! :D Good Luck! ] (More)
Question
Updated 12/4/2014 10:11:30 PM
1 Answer/Comment
9 can be added to x^2 - 6x to form a perfect square trinomial.
x^2 - 6x + 9 = (x - 3)^2
Added 12/4/2014 10:11:30 PM
This answer has been confirmed as correct and helpful.
Solve the following quadratic equation using the quadratic formula and then choose the correct solution set. 5x^2 + 7x = 6
Question
Updated 11/21/2014 11:24:30 PM
1 Answer/Comment
5x^2 + 7x = 6 ;
5x^2 + 7x - 6 = 0 ;
(5x - 3)(x + 2) = 0 ;
when 5x- 3 = 0 , x = 3/5 ;
when x + 2= 0 , x = -2 ;
The solution for 5x^2 + 7x = 6 is x = 3/5 , or x = -2.
Added 11/21/2014 11:24:30 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [11/21/2014 11:28:41 PM]
Solve the following quadratic equation using the quadratic formula and then choose the correct solution set. 6x^2 - 7x + 2 = 0
Question
Updated 11/21/2014 11:19:55 PM
1 Answer/Comment
6x^2 - 7x + 2 = 0
(3x - 2)(2x - 1) = 0
3x - 2 = 0 ,x = 2/3
2x - 1 = 0, x = 1/2
The solution for 6x^2 - 7x + 2 = 0 is x = 2/3 , or x = 1/2 .
Added 11/21/2014 11:19:55 PM
This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [11/22/2014 4:50:34 AM], Rated good by andrewpallarca
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