Find the exact value of the expression. Do not use a calculator.
, if ? = 45°
A. 
B. 12
C. 
D. 3
Answer: C
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Find the exact area under the curve between the indicated values of x.y = 2x - x2; between x = 0 and x = 2
A. 
B. 
C. 
D. 
The graph of a function f is given. Use the graph to answer the question.For what numbers x is f(x) > 0?
A. (-12, ?) B. (-? -12) C. (-12, 14) D. [-20, -12), (14, 20)
Convert the temperature.9°F = °C
A. 27.0°C B. -12.8°C C. 48.2°C D. 15.8°C
?Seven hundred gallons of 89-octane gasoline is obtained by mixing 87-octane gasoline with 92-octane gasoline. How much of each type of gasoline is required to obtain the 700 gallons of 89-octane gasoline? Use this system of linear equations there x and y represent the number of gallons of the 87-octane gasoline and 89-octane gasoline.
?
?
?
A. 87?-octane: 89 gal; 92-octane: 280 gal ? B. 87?-octane: 280 gal; 92-octane: 420 gal? C. 92??-octane: 89 gal; 87-octane: 280 gal D. ??87-octane: 420 gal; 92-octane: 280 gal E. ??92-octane: 280 gal; 87-octane: 89 gal