Find the indicated vector.Let u = 
. Find -9u.
A. 
B. 
C. 
D. 
Answer: D
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Factor completely.p5q2 - 3p4q3 - 18p3q4
A. p3q2(p + 6q)(p - 3q) B. p3q2(p - 6q)(p + q) C. p3q2(p + q)(p - 3q) D. p3q2(p - 6q)(p + 3q)
Write the sum or difference as a product containing only sines and/or cosines.cos 
+ cos 
A. 2 sin(2?) sin 
B. 2 sin(2?) sin ?
C. 2 cos(2?) cos 
D. 2 cos(2?)
Solve the problem.Use regression to find constants a, b, c, and d so that f(x) = a sin 
+ d models the data given below.
A. 5.277184939; 0.06297637; -2.04256248; 6.904195597 B. 4.708150061; 1.025102863; -2.474285177; 7.076487153 C. 5.099259265; 0.5315780435; -1.738394218; 8.659926499 D. 5.099259265; 0.5315780435; -1.738394218; 6.659926499
Solve the problem.Suppose there are 7 roads connecting town A to town B and 5 roads connecting town B to town C. In how many ways can a person travel from A to C via B?
A. 25 B. 12 C. 49 D. 35