Find the sum without the use of a number line.22 + (-9)
A. -13
B. 31
C. -31
D. 13
Answer: D
Mathematics
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Use Chebyshev's theorem to solve the problem.Find the least possible percentage of numbers in a data set lying within 3/2 standard deviations of the mean. Give your answer to the nearest tenth of a percent.
A. 55.6% B. 44.4% C. 66.7% D. 33.3%
Mathematics
The vectors u, v, and w are drawn below. Sketch the given vector. 
u - v
A. 
B. 
C. 
D. 
Mathematics
Find the nth, or general, term.9, 3, 1, . . .
A. 3(n - 1) B. 3n-1 C. 33-n D. 3n
Mathematics
Which graph represents the function?
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics