Solve the formula for the indicated letter. Assume that all variables represent nonnegative numbers.x = 
for r
A. r = 
B. r = x + y
C. r = 
D. r = 
Answer: A
Mathematics
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Determine whether the function is a probability density function over the given interval.f(x) = 
x, 0 ? x ? 4
A. Yes B. No
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Use the graph to evaluate the limit.
f(x)
A. 1 B. -1 C. Does not exist D. 0
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Solve the problem.A figure ABCDEF and its image A'B'C'D'E'F' after a rotation are given. Which point of the grid is the center of rotation?
A. P B. S C. Q D. B
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Match the graph with its function using the x-intercepts.
A. f(x) = x-2 - x-1 - 2 B. f(x) = x-2 + x-1 - 2 C. f(x) = x-2 - x-1 + 2 D. f(x) = x-2 + x-1 + 2
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