Solve.A signal is made by placing 3 flags, one above the other, on a flag pole. If there are 6 different flags available, how many possible signals can be flown?
A. 18
B. 216
C. 20
D. 120
Answer: D
Mathematics
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Solve using the problem-solving strategy for systems of linear equations.The three angles in a triangle always add up to 180°. If one angle in a triangle is 72° and the second is 5 times the third, what are the three angles?
A. 72°, 89°, 19° B. 72°, 91°, 17° C. 72°, 88°, 20° D. 72°, 90°, 18°
Mathematics
Evaluate the expression using the given values.
?x = 8, y = 3
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Let f(x) compute the time in hours to travel x miles at 
per hour. What does f-1(x) compute?
A. The miles traveled in 39 hours B. The hours taken to travel x miles C. The miles traveled in x hours D. The hours taken to travel 39 miles
Mathematics
Calculate the period of the function.f(x) = cos 13x - cos 8x
A. 104 B. 104? C. 2? D. 208?
Mathematics