Perform the operations.-x(x2 + 4) - 4x2(3x - 3)
A. -13x3 - 12x2 - 4x
B. -13x3 + 8x2
C. -13x3 + 12x2 - 4x
D. -3x3 + 12x2 + 4x
Answer: C
Mathematics
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Provide an appropriate response.Find the polar coordinates of a vector in standard notation that has rectangular coordinates of (1, 4).
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Solve.
+ 
= 
A. -3, 1 B. 1 C. -3, -1 D. 3, 1
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Provide an appropriate response.True or false? If r is an x-intercept of the graph of y = f(x), then 
has an x-intercept at x = -r.
A. True B. False
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Solve the problem.A painter can finish painting a house in 3 hours. Her assistant takes 5 hours to finish the same job. How long would it take for them to complete the job if they were working together?
A. 
hour
B. 4 hours
C. 2 hours
D. 1
hours
Mathematics