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

Lighting a match is a chemical reaction . The reaction starts when a match head

Expert answered|anithasri|Points 40|

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

Weegy: best answer is A. (-2, 4) (More)

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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

Weegy:
2x^2 = 32;
x^2 = 32/2;
x^2 = 16;
x = ±4
(More)

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Updated 16 days ago|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 46 days ago|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 46 days ago|8/1/2014 12:40:04 PM

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 32 days ago|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 32 days ago|8/15/2014 2:41:47 AM

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