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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Expert Answered

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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Expert Answered

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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What is the range of y = -3x2 + 2?
A. y = -3
B. y = 2
C. y = 2
D. y: all real numbers
**Weegy:** Solution :
(4x^2 ? 2x + 3) ? ( -3x^2 + 2x ? 5)
4x^2 ? 2x + 3 + 3x^2 - 2x + 5 =
7x^2 - 4x + 8 (answer) **User:** What is the range of y = -3x2 + 2?
A. y = -3
B. y = 2
C. y = 2
D. y: all real numbers
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Expert Answered

Updated 8/15/2014 2:41:47 AM

1 Answer/Comment

y=2 is the range of y = -3x2 + 2.

When x=0,the value of y the lagest. y=-3*0+2, y=2.

When x=0,the value of y the lagest. y=-3*0+2, y=2.

Added 8/15/2014 2:41:47 AM

Simplify: (n + 3)2
A. n2 + 9
B. n2 + 9n + 9
C. n2 + 6n + 9
D. n2 + 6

Question

Expert Answered

Updated 1/1/2013 12:20:10 PM

1 Answer/Comment

(n + 3)^2

the result is C. n2 + 6n + 9

the result is C. n2 + 6n + 9

Added 1/1/2013 12:20:10 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

2 Answers/Comments

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

This answer has been confirmed as correct, not copied, and helpful.

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

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