Select the correct answer
?
A. 
B. 
C. 
D. 
E. 
Answer: B
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Find projv u.v = k, u = 9i + 2j + 6k
A. 6k
B. 
k
C. 
i + 
j + 
k
D. 
i + 
j + 
k
Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions.4x2 + 4x + 1 = 0
A. Two different imaginary solutions B. Two different irrational solutions C. Exactly one rational solution D. Two different rational solutions
Find the remaining zeros of f(x) given that c is a zero. Then rewrite f(x) in completely factored form.f(x) = x3 + 2x2 - 9x - 18; c = 3 is a zero
A. -3, -2; f(x) = (x + 3)(x + 2)(x - 3) B. -3; f(x) = (x + 3)(x2 - x - 6) C. -3, 2, 3; f(x) = (x + 3)(x - 2)(x - 3) D. -2; f(x) = (x + 2)(x2 + x - 9)
Solve the problem.An express train travels 360 miles between two cities. During the first 
of a trip, the train traveled through mountainous terrain. The train traveled 
per hour slower through mountainous terrain than through level terrain. If the total time to travel between the cities was 9 hours, find the speed of the train on level terrain.
A. 30 mph B. 60 mph C. 45 mph D. 15 mph