Perform the indicated operation.11y2(-5y2 - 3y + 7)

A. 55y4 + 33y3 - 77y2
B. -55y4 - 33y2 + 77y
C. -55y4 - 33y3 + 77y2
D. -55y3 - 33y2 + 77y


Answer: C

Mathematics

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s is the distance (in feet) traveled in time t (in seconds) by a particle. Find the acceleration at the given time.s = ; t = 2 s

A. -  ft/s2
B. -  ft/s2
C.  ft/s2
D.  ft/s2

Mathematics

Write an equivalent expression by factoring out the greatest common factor.27x9y8 + 63x7y6 + 45x5y2

A. 9(3x9y8 + 7x7y6 + 5x5y2) B. 9x5(3x4y8 + 7x2y6 + 5y2) C. -9x5y2(-3x4y6 + 7x2y4 - 5) D. 9x5y2(3x4y6 + 7x2y4 + 5)

Mathematics

Solve the problem.In an electric circuit, the electromotive force is defined as V = cos 2?t, where t is time in seconds. Solve the equation for t.

A. t =  arccos V
B. t =  cos V
C. t = 2? arccos V
D. t = 2? cos V

Mathematics

Simplify by removing parentheses and collecting like terms.8x - (2x - 14)

A. 6x + 14 B. 6x - 14 C. -6x - 14 D. -6x + 14

Mathematics