Translate the problem to a system of equations, then solve using matrices.Carole's car averages 13.2 mi/gal in city driving and 25.8 mi/gal in highway driving. If she drove a total of 518.4 mi on 24 gal of gas, how many of the gallons were used for city driving?
A. 10 gal
B. 8 gal
C. 16 gal
D. 21 gal
Answer: B
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Write the sum or difference as a product containing only sines and/or cosines.sin(4?) - sin(2?)
A. sin(3?) cos ? B. sin ? cos(3?) C. 2 sin(3?) cos ? D. 2 sin ? cos(3?)
Solve the problem.Kevin asked some of his friends how many hours they worked during the previous week at their after-school jobs. Make a frequency distribution of the hours using the data below. Use the intervals
5-6, 7-8, and 9-10. 
Frequency Distribution of Hours Worked 
What will be an ideal response?
Find f(x) = a(x - h)2 + k so that f models the data exactly.
A. f(x) = 
(x - 5)2 - 8
B. f(x) = (x + 5)2 + 8
C. f(x) = 
(x + 5)2 + 8
D. f(x) = 2(x - 8)2 - 5
Find all values of the variable for which the rational expression is undefined.
A. -5, 8 B. -8, 5 C. -4, 4 D. 0