Identify the interval where f is increasing or decreasing, as indicated. Express your answer in interval notation.f(x) = -5x2 + 20x; increasing
A. (-?, 2]
B. (-?, -2]
C. [-2, ?)
D. [2, ?)
Answer: A
Mathematics
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Find f(x) and g(x) such that h(x) = (f ? g)(x).h(x) = (-3x + 17)9
A. f(x) = x9, g(x) = -3x + 17 B. f(x) = -3x9, g(x) = x + 17 C. f(x) = -3x + 17, g(x) = x9 D. f(x) = (-3x)9, g(x) = 17
Mathematics
The question(s) that follow refer to the problem of finding the minimum spanning tree for the weighted network shown below.
Which of the following edges of the given network are not part of the minimum spanning tree?
A. AC B. DF C. EF D. CD E. none of these
Mathematics
Multiply. Assume all variables represent nonnegative real numbers.
? 
A. 20
B. -12
C. -20
D. 12
Mathematics
Simplify. Assume that no radicands were formed by raising negative quantities to even powers.
A. 
B. 
C. 21
D. 
Mathematics