Graph the function.y = 
sin (x - ?)
A. 
B. 
C. 
D. 
Answer: B
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Identify a method whereby a random sample can be selected from the population.The organizer of a contest would like to select a random sample of 20 prizewinners from the 627 contestants who correctly answered all questions.
A. Select the first 20 contestants whose names begin with the letter C. B. Choose the 20 responses which have the earliest postmark. C. Construct a spinner with ten 36° sectors numbered 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. Assign each contestant a number from 001 to 627. Generate a random sequence of three-digit numbers by repeatedly spinning the spinner 3 times. Ignore any number greater than 627, any number already obtained, or 000. When 20 appropriate numbers have been generated, they can be used to identify the contestants to be included in the sample.
Graph the solution set of the system of inequalities.
+ 
? 1
+ 
? 1
A. 
B. 
C. 
D. 
Find an equation of variation in which the following are true.y varies jointly as x and z, and y = 90 when x = 3 and z = 6
A. y = 
B. y = 5xz
C. y = 30x
D. y = 7xz
Simplify the expression.
A. 
B. 
C. 
D. 