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

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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 285 days ago|12/17/2015 10:43:00 AM

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

Edited by Andrew. [12/17/2015 10:42:59 AM], Confirmed by Andrew. [12/17/2015 10:43:00 AM]

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Which of the following points is on the graph of the equation y = x2 ? A. (-2, 4) B. (-5, 10) C. (5, 10) D. (4, 8)

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Asked 12/31/2012 10:47:41 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

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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

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andrewpallarca

(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

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

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

What do zeroes, roots, and x-intercepts all represent? A. Maximums of a quadratic function B. Minimums of a quadratic function C. Solutions of a quadratic function D. Vertex of a quadratic function User: A baseball player hits a baseball into the outfield. The following equation models the ball's path. If not caught, when will the baseball land? Round to the nearest tenth second. h = -16t2 + 50t + 4 A. 3.0 seconds B. 3.2 seconds C. 3.4 seconds D. 3.6 seconds

Weegy: B. 3.2 seconds (More)

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Asked 12/31/2012 12:13:27 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 (More)

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

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janezeshun

y=2 is the range of y = -3x2 + 2.
When x=0,the value of y the lagest. y=-3*0+2, y=2.

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