Simplify the expression. Assume that all variables are positive.
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Determine whether the study involves selection bias, participation bias, both selection bias and participation bias, or neither."38% of adults in the United States regularly visit a doctor". This conclusion was reached by a college student after she had questioned 520 randomly selected members of her college.
A. Selection bias B. No bias C. Participation bias and selection bias D. Participation bias
Mathematics
Simplify the expression.32
A. -6 B. -9 C. 9 D. 6
Mathematics
Find a so that the statement is true.
a = __________
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve for the variable.x + 
= 11
A. 
B. 
C. 
D. 43
Mathematics