Perform the indicated operation.[ (4x2 - 3x + 7) - (4x2 - 2x - 3) ] - [ (2x2 + 4x - 6) + (-4x2 - 2x - 2) ]
A. 2x2 - 3x + 18
B. 10x2 - 7x + 12
C. -6x2 - 7x + 14
D. 2x2 - 7x + 18
Answer: A
Mathematics
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Rewrite the expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the trigonometric expression without the use of a calculator.cos2 60° - sin2 60°
A. - 
B. - 
C. 
D. 
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Add or subtract terms whenever possible.
+ 
+ 
+ 
A. 181
+ 15
B. 19
+ 
+ 
C. 
+ 
+ 15
D. 19
+ 15
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Graph the system of inequalities. Shade the region that represents the points of intersection.
A. 
B. 
C. 
D. 
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Graph the piecewise linear function.f(x) = 
A. 
B. 
C. 
D. 
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