Divide and simplify.
÷ 
A. -2
B. -10
C.
D. 2
Answer: A
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Multiply. Assume that all variables represent nonnegative real numbers.2
A. 49t2 + 2 + r2
B. 7t + + r
C. 49t2 + + r2
D. 7t + 2 + r
Find the requested vector.v = 5i - 4j + k, u = -5i + 2j + 3kFind a vector orthogonal to both v and u.
A. -8i + 4j - 16k B. -2i - 8j + 8k C. -14i - 20j - 10k D. 2i + 8j + 22k
Find the standard deviation.The management of an amusement park wanted to determine the amount of waiting time for the park's oldest roller coaster. The following data represents a random sample of waiting times in minutes (rounded to the nearest minute): 14 7 11 15 17 7 7 11 13What is the standard deviation? Round your answer to one decimal place.
A. 3.5 min B. 3.7 min C. 4.0 min D. 1.4 min
Classify the system as consistent or inconsistent, and dependent or independent.3x = y + 36x - 2y = 3
A. Inconsistent and dependent B. Consistent and independent C. Inconsistent and independent D. Consistent and dependent