Find the unit vector having the same direction as v.v = -3i + j
A. u = - 
i - 
j
B. u = - 
i + 
j
C. u = -3
i + 
j
D. u = - 
i + 
j
Answer: B
Mathematics
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Classify the equation as a conditional equation, an identity, or a contradiction. Find the solution set.18(x - 1) = 2(9x + 2) - 22
A. Contradiction; ? B. Conditional; {0} C. Conditional; {-18} D. Identity; {all real numbers}
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A. p2 - 14q2 B. p2 - 14pq - 49q2 C. p2 - 49q2 D. p2 + 14pq - 49q2
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Mathematics