Solve the problem.Insert parentheses, if needed, so that the expression on the left is equal to the number on the right.8 + 2 ? 42 = 72
A. 8 + (2 ? 42)
B. 8 + (2 ? 4)2
C. (8 + 2) ? 42
D. No parentheses needed
Answer: B
Mathematics
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Divide.
A. -2x2 - 2x - 5 + 
B. x2 - 5 + 
C. -2x2 - 2x - 5 + 
D. -2x2 - 2x - 5
Mathematics
Find the mean and standard deviation of the specified probability density function.f(x) = 0.6e-0.6x for [0, ?)
A. ? = 1.67, ? = 1.67 B. ? = 16.67, ? = 16.67 C. ? = 1.71, ? = 1.67 D. ? = 1.5, ? = 1.5
Mathematics
For the given function, find the indicated function value.For f(x) = 
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Mathematics