Q: Classify the following change as physical or chemical: A match lights when struck.
A. Physical change
B. Chemical change

A: A match lights when struck. This is a chemical change.

Expert answered|anithasri|Points 40|

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Asked 1/5/2013 12:08:44 AM

Updated 12/17/2015 10:43:00 AM

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Solve the quadratic equation. 2x^2 = 32
A. x = ±4
B. x = 2 and x = 32
C. x = 1 and x = 16
D. x = ±2 **Weegy:**
2x^2 = 32;
x^2 = 32/2;
x^2 = 16;
x = ±4
(More)

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Updated 8/31/2014 6:26:33 PM

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Solve for x: (2x - 4)2 = 1
A. 2, 3
B. 3/2, 5/2
C. 3/2, 3/5
D. 3/2, -5/2
**Weegy:** The answer is A. 2,3. (More)

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Updated 8/1/2014 12:40:07 PM

1 Answer/Comment

(2x - 4)^2 = 1;

4x^2 - 16x + 16 = 1;

4x^2 - 16x + 16 - 1 = 0;

4x^2 - 16x + 15 = 0;

(2x - 3)(2x - 5) = 0;

2x - 3 = 0; 2x = 3; x = 3/2;

2x - 5 = 0; 2x = 5; x = 5/2;

Solutions: x = 3/2 or x = 5/2

4x^2 - 16x + 16 = 1;

4x^2 - 16x + 16 - 1 = 0;

4x^2 - 16x + 15 = 0;

(2x - 3)(2x - 5) = 0;

2x - 3 = 0; 2x = 3; x = 3/2;

2x - 5 = 0; 2x = 5; x = 5/2;

Solutions: x = 3/2 or x = 5/2

Added 8/1/2014 12:40:04 PM

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Factor out the greatest common monomial: 25a6 - 10a5 - 40a4
A. 5(5a6 - 2a5 - 8a4)
B. 5a(5a3 - 2a2 - 8a)
C. 5a4(5a2 - 2a - 8)
D. 5a6(5 - 2a-1 - 8a-2)
**Weegy:** A (More)

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Expert Answered

Updated 8/31/2014 6:08:09 PM

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Factor out the greatest common monomial: 25a6 - 10a5 - 40a4 is 5a4(5a2 - 2a - 8).

25a6 - 10a5 - 40a4

=5a4(5a2-2a-8).

25a6 - 10a5 - 40a4

=5a4(5a2-2a-8).

Added 8/31/2014 6:08:09 PM

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Rated good by andrewpallarca, Confirmed by andrewpallarca [8/31/2014 6:21:08 PM]

Factor the polynomial by grouping: x^2 - 2x + 3x - 6
A. (x - 3)(x + 2)
B. (x - 2)(x + 3)
C. 2(x - 2)(x + 3)
D. x2 + x - 6 **Weegy:** x^2 - 2x + 3x - 6
= (x - 2)(x + 3) (More)

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Updated 6/8/2014 4:34:01 PM

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Simplify: (5x - 10)2
A. 10x2 - 20
B. 25x2 - 100
C. 25x2 - 100x + 20
D. 25x2 - 100x + 100
**Weegy:** D. 25x2 - 100x + 100 (More)

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Updated 5/13/2014 8:34:36 AM

1 Answer/Comment

(5x - 10)^2;

(5x - 10)(5x - 10);

25x^2 - 50x - 50x + 100

= 25x^2 - 100 + 100

(5x - 10)(5x - 10);

25x^2 - 50x - 50x + 100

= 25x^2 - 100 + 100

Added 5/13/2014 8:34:36 AM

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