Simplify the expression. Assume that all variables are positive when they appear.
? 
A. 6
B. -2x
C. 5x
D. 6x2
Answer: D
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Find the probability. Round to the nearest ten-thousandth when necessary.A family has five children. The probability of having a girl is 1/2. What is the probability of having at least 3 boys?
A. 0.5 B. 0.4688 C. 0.1563 D. 0.3125
Determine if the sequence is arithmetic. If the sequence is arithmetic, find the common difference.a1 = 2, an = an - 1 + 8
A. yes, 8 B. no C. yes, 2 D. yes, 1
Subtract and simplify. Write the answer as a mixed number as needed.11 - 9
A. 10
B. 2
C. 1
D. 2
Solve the problem.A company has fixed costs of $800 and the linear cost function is 
Which do you think is larger, the average cost per item of producing n items or the marginal cost given that n items have been produced? Explain your thinking. Under what conditions would the marginal cost and the average cost per item be the same?
What will be an ideal response?