The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport. 
At what time was the temperature its lowest?
A. 6 p.m.
B. 4 p.m.
C. 9 a.m.
D. 1 p.m.
Answer: C
Mathematics
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Find the exact value of the following expression without using a calculator.tan 
A. - 
B. - 
C. - 
D. 
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Collect like terms.9x - 6x
A. 3x B. 15x C. -3x D. 3x2
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Determine whether the given point (x,y) is on the unit circle.
A. No B. Yes
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Evaluate the integral using the given substitution.
, u = cot 7?
A. 
csc3 7? cot2 7? + C
B. - 
tan2 7? + C
C. 
cot2 ? + C
D. - 
cot2 7? + C
Mathematics