Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.
A. 3x
B. 21
C. 21x
D. 3
Answer: D
Mathematics
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Solve.
= 
+ 
A. 3
B. -3
C. 
D. - 
Mathematics
Give the domain and range for the rational function. Use interval notation.f(x) = 
+ 3
A. Domain: (-?, 0) ? (0, ?); Range: (-?, 3) ? (3, ?) B. Domain: (-?, 2) ? (2, ?); Range: (-?, 3) ? (3, ?) C. Domain: (-?, 3) ? (3, ?); Range: (-?, 0) ? (0, ?) D. Domain: (-?, 0) ? (0, ?); Range: (-?, -3) ? (-3, ?)
Mathematics
Rewrite the trigonometric expression as an algebraic expression involving the variable u. Assume that 
and that the value of the "inner" inverse trigonometric expression represents an angle ? such that 
csc (tan-1 u)
A. 
B. 
C. 
D. 
Mathematics
Factor. Check by multiplying.5x - 20y
A. 5(x - 4y) B. 5(x - 20y) C. 4(5x - 5y) D. 5(x - y)
Mathematics