Multiply. Simplify, if possible.- 

A. - y
B. - y
C. y
D. y


Answer: B

Mathematics

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Solve the problem.The decay of 514 mg of an isotope is given by A(t) = 514e-0.021t, where t is time in years. Find the amount left after 63 years.

A. 137 mg B. 503 mg C. 134 mg D. 69 mg

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Solve the equation.8(y + 6) = 10y + 48

A. -48 B. 48 C. 0 D. 96

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Add the polynomials.(4x2 - 4x - 1) + (6x2 - 4x + 4)

A. 10x4 - 8x2 + 3 B. 10x2 - 8x + 3 C. 24x2 - 4x + 3 D. 10x2 - 4x + 3

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Factor completely.20x2 - 100x + 125

A. -10(2x - 5)2 B. 5(2x + 5)(2x - 5) C. 5(2x + 5)2 D. 5(2x - 5)2

Mathematics