Solve the system.
A. x = 3, y = -6, z = -1, w = -1
B. x = -3, y = -3, z = 1, w = -2
C. x = 3, y = -3, z = 1, w = -1
D. x = 1, y = -1, z = 3, w = -2
Answer: C
Mathematics
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Find the unit tangent vector of the given curve.r(t) = 
i + 
j - 12tk
A. T = 
i + 
j - 
k
B. T = 
i + 
j - 
k
C. T = 
i + 
j - 
k
D. T = 
i + 
j - 
k
Mathematics
Find the prime factors for the following:
a. 4xy3 b. 55a2b c. 12ax2 d. 7ab4
Mathematics
Solve the problem.Ray's gross pay is $321.20 a week. $46 is withheld for federal income tax, $24.12 for FICA tax, and $11.24 for other deductions. How much of his pay is left?
A. $402.56 B. $81.36 C. $229.84 D. $239.84
Mathematics
Collect like terms.-9b + 4a + 4c + 2b + 7a
A. -3a - 7b + 4c B. 11a - 7b + 4c C. -7a + 11b + 4c D. 11a - 7b
Mathematics