Identify each pair of supplementary angles.
A. ?ARS and ?BRS;
?BRQ and ?QRA
B. ?ARS and ?BRQ;
?QRA and ?BRS
C. ?ARS and ?BRS;
?BRS and ?QRB;
?ARS and ?BRQ;
?QRA and ?BRS
D. ?ARS and ?BRS;
?BRS and ?QRB;
?QRA and ?SRA;
?BRQ and ?QRA
Answer: D
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The figure shows the percentage of the U.S. population, f(x), made up of teachersas a function of time, x, where x is the number of years after 1900. Use the graph to solve the problem. 
In which year did the percentage of teachers in the U.S. reach a minimum?
A. 2000 B. 1900 C. 1970 D. 1990
Graph the function.f(t) = - cos 
A. 
B. 
C. 
D. 
Find the x- and y-intercepts from the graph. If there are no intercepts write "No x-intercept" or "No y-intercept".
A. (0, -7), (-1, 0) B. (0, 0), (-1, -7) C. (0, -1), (-7, 0) D. (-7, -1), (0, 0)
Provide an appropriate response.Explain the process you would use to determine the best buy.
What will be an ideal response?