Solve the problem.How many relay teams of 4 members can be chosen from a 9 member team to run in a relay race?
A. 30
B. 504
C. 36
D. 3024
Answer: D
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Solve the problem by setting up and solving a system of two linear equations in two variables. Use either the elimination-by-addition or the substitution method to solve the system.Suppose that a certain motel rents double rooms at $34 per day and single rooms at $26 per day. If a total of 42 rooms was rented one day for $1,252, how many of single rooms were rented?
A. 27 rooms B. 20 rooms C. 22 rooms D. 42 rooms. E. none of these
Evaluate the integral.
A. 3 tan-1 
+ C
B. 
tan-1 
+ C
C. 
tan-1 3x + C
D. 
tan-1 (x + 3) + C
Find the angle between vectors v and w. Round the answer to the nearest tenth of a degree.v = i - j, w = 2i + 4j
A. 116.6° B. -18.4° C. 18.4° D. 108.4°
Evaluate the radical function at the indicated value.f(x) = -
f(21)
A. -6 B. 42 C. -36 D. 6