Use the figure showing isotherms for the United States to answer the question. 
Which city has approximately the same temperature as Chicago?
A. Denver
B. Los Angeles
C. New York
D. San Francisco
Answer: B
Mathematics
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Solve the equation for real values of the variable by factoring.
?
What will be an ideal response?
Mathematics
Solve the system by elimination.
A. (1, 0) B. (0, 1) C. (-1, 2) D. (0, 2)
Mathematics
Use the Principle of Mathematical Induction to show that the statement is true for all natural numbers n.1 ? 2 + 2 ? 3 + 3 ? 4 + . . . + n(n + 1) = 
What will be an ideal response?
Mathematics
If 
, evaluate the following function.
?cot x
?
A. ?cot x =
B. ?cot x = 
C. ?cot x = 2
D. ?cot x = 
E. ?cot x = 
Mathematics