Solve.x2 - x = 20
A. -4, -5
B. 4, 5
C. 1, 20
D. -4, 5
Answer: D
Mathematics
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The vector r(t) is the position vector of a particle at time t. Find the angle between the velocity and the acceleration vectors at time t = 0.r(t) = e7ti + (8 + e-7t)j + (10 cos 8t)k
A. 
B. 
C. 
D. 0
Mathematics
Multiply.-3(3v)
A. 0v B. 3v - 3 C. -33 - 3v D. -9v
Mathematics
Solve the equation.
- k = 0
A. 9 B. 9, -9 C. -9 D. 9, -7
Mathematics
Write a model for the statement.s varies directly as the 
of t
A. 
B. 
C. 
D. 
E. 
Mathematics