Find the derivative.y = (2x - 1)3(x + 7)-3
A. 
= 45(2x - 1)2(x + 7)-3
B. 
= 45(2x - 1)2(x + 7)-4
C. 
= 45(2x - 1)3(x + 7)-2
D. 
= 45(2x - 1)3(x + 7)-4
Answer: B
Mathematics
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Perform the indicated operation.
A. 12 B. 9 C. -12 D. -9
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Solve the problem.Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students and B's to the next 23%. What is the bottom cutoff for a B grade? Round your answer to the nearest whole number.
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Factor the polynomial completely.16x3y + 32x2y + 16xy
A. 2y(4x + 1)(2x + 8) B. 2xy(8x + 4)(x + 2) C. 2xy(4x + 4)(2x + 2) D. 2xy(4x + 1)(2x + 8)
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Determine whether the pair of fractions is equivalent.
and 
A. equivalent B. not equivalent
Mathematics