Multiply.(-3 + 4x)(-7 + 4x)

A. 16x2 - 40x + 21
B. 4x2 - 40x - 40
C. 16x2 - 41x + 21
D. 16x2 + 21x - 40


Answer: A

Mathematics

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A. -270 B. -30 C. 75? D. -75?

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Reduce the fraction.

A.  
B.
C.  
D.  

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Find the length of the third side of the right triangle. Assume that c represents the length of the hypotenuse. Give an exact answer and, if appropriate, an approximation to three decimal places.b = 20, c = 25

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Determine the real solutions to the system of nonlinear equations.y2 + 2x2 = 28y2 - x2 = 1

A. (4, ), (4, -)
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