Simplify the expression. Assume all variables represent nonnegative real numbers.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Use the formula for 
to solve.In a contest in which 7 contestants are entered, in how many ways can the 5 distinct prizes be awarded?
A. 84 B. 2520 C. 42 D. 21
Mathematics
Solve for the requested variable.y varies directly as x and inversely as the square of z, and y = 20 when x = 32 and z = 4. Find y when 
and z = 2.
A. y =200 B. y = 100 C. y =6.25 D. y =50
Mathematics
The function Y2 is defined as Y1 + k for some real number k. Based upon the given information about Y1 and Y2, find k. 
A. 5 B. 2 C. 1 D. 4
Mathematics
Find the domain of the function. Put your answer in set-builder notation.f(x) = 
A. {x 
B. {x 
C. {x 
D. {x 
Mathematics