Evaluate the expression using the given values.r - 7u - 
(s - 6t); r = -2.5, s = 5, t = -5, u = 4.5
A. -36
B. - 29
C. -27
D. -41
Answer: D
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Find the derivative of the function by first expanding or simplifying the expression. f(x) = (3x + 4)2
A. f'(x) = 9x + 16 B. f'(x) = 9x + 12 C. f'(x) = 18x + 24 D. f'(x) = 6x + 8
Match the correct function to the graph.
A. y = |x + 2| B. y = |2 - x| C. y = x - 2 D. y = |1 - x|
Use Pascal's triangle to expand the binomial.(x3 - 2y2)5
A. x15 - 10x12y2 + 40x9y4 - 80x6y6 + 80x3y8 - 32y10 B. x15 - 32y10 C. x15 - 10x7y2 + 40x6y4 - 80x5y5 + 80x3y6 - 32y7 D. x15 - 2x12y2 + 4x9y4 - 8x6y6 + 16x3y8 - 32y10
Suppose that, for a certain exam, a teacher grades on a curve. It is known that the mean is 50 and the standard deviation is 6. There are 60 students in the class. How many students should receive a C?
?
?
A. 43 B. 35 C. 37 D. 21 E. 41