Simplify the expression. Assume that all variables are positive when they appear.
A. y
B. y3
C. y6
D. 
Answer: B
Mathematics
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Find the sign of the following.cos (? + 180°), given that ? is in the interval (90°, 180°).
A. positive B. negative
Mathematics
Solve the problem.Construct a possibility tree that shows all possible 2-letter code words using only the letters w, x, and y with no repetitions.
A. 
B. 
C. 
D. 
Mathematics
Simplify the expression.
?
?
A. - 6 B. 6 C. 4 D. 10 E. - 4
Mathematics
Find an equation for the ellipse described.Center (0, 0); major axis vertical with length 8; length of minor axis is 6
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics