Find the unit vector that has the same direction as the vector v.v = -3i + j
A. u = 
i + 
j
B. u = -3
i + 
j
C. u = 
i + 
j
D. u = 
i + 
j
Answer: C
Mathematics
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Given the values of x and y, find an equation of variation in which y varies directly as x.y = 230, when x = 90
A. x = 140y B. x = 2.56y C. y = 2.56x D. y = 0.39x
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Graph the system.
A. 
B. 
C. 
D. 
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Answer the question about the period of the function.Find the period of the function f(?) = tan (5?).
A. 5?
B. 
C. 
D. - 
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