Find the unit vector in the same direction as the given vector.v = -2j
A. u = -j
B. u = 4j
C. u = - 
j
D. u = -2j
Answer: A
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Apply the distributive property.5x(9 - x)
A. -5x2 - 45x B. -5x2 + 45x C. 5x2 + 45x D. 5x2 - 45x
The nth term of a sequence is given. Find the first 4 terms.an = 
A. 1, 
, 
, 
B. 
, 
, 
, 
C. 
, 
, 
, 
D. 
, 
, 
, 
Use the product rule to simplify the expression.
A. 5
B. 2
C. 2
D. 
Solve the problem.A survey of 1,981 credit card users indicated that 911 had bought books online, 876 had bought music online, 439 had bought pet supplies online, 139 had bought both books and music, 200 had bought both books and pet supplies, 160 had bought both music and pet supplies, and 93 had bought all three. How many credit card users did not buy any of the three? How many bought either books or pet supplies but not music?
A. 161; 944 B. 161; 837 C. 254; 837 D. 161; 930