Find a unit vector that has the same direction as the given vector.t = 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find the vector projv u.v = 7i - 3j + k, u = -4j + 3k
A. 
i - 
j + 
k
B. 
i - 
j + 
k
C. - 
j + 
k
D. - 
j + 
k
Mathematics
Solve and simplify.
? x = 171
A. 23 B. 385 C. 171 D. 76
Mathematics
Solve the problem.If half a number is added to 7, the result is greater than or equal to -3. Find all such numbers.
A. x ? -21 B. x ? 4 C. x ? -20 D. x > -20
Mathematics
Graph the equation.(x - 5)2 + y2 = 16 
A. 
B. 
C. 
D. 
Mathematics