Use the vectors u, v, and w in the accompanying figure to graph the vector. 
u + z
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.A biologist collected 213 fern and moss samples. There were 157 more moss than fern samples. How many fern samples did the biologist collect?
A. 56 fern samples B. 185 fern samples C. 28 fern samples D. 171 fern samples
Mathematics
Find the equation in standard form of an ellipse centered at the origin that passes through the given points.(-4, 0), (4, 0), (0, -9), and (0, 9)
A. 16x2 + 81y2 = 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Indicate whether the statement is true always, sometimes, or never.The difference between two real numbers is a real number.
A. Always B. Sometimes C. Never
Mathematics
Simplify the rational expression. If the rational expression cannot be simplified, so state.
A. 
B. 
C. 
D. 
Mathematics