Solve and check.x2 - 4x - 45 = 0
A. -5, 9
B. -9, 5
C. -5, -9
D. 5, 9
Answer: A
Mathematics
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 0 for r(t) = cos(4t)i + 2ln(t - 9)j - 
k
A. v(0) = -4i - 
j
B. v(0) = 4i - 
j
C. v(0) = -
j
D. v(0) = 
j
Mathematics
Write as an improper fraction.17
A. 
B. 
C. 
D. 
Mathematics
Compare the decimal numbers, and insert <, >, or = to form a true statement.0.758 
0.75800
A. = B. < C. >
Mathematics
Use Cramer's rule to solve the linear system. If D = 0, use another method to determine the solution set. 4x - 4y - 5z = -48 4x + 2y + 8z = 98-6x - 4y + 2z = -42
A. {(6, 5, 8)} B. {(5, -7, -8)} C. {(7, 8, 7)} D. {(5, 7, 8)}
Mathematics