Solve.x - y + z = -7x + y + z = -3x + y - z = 5
A. (-4, -1, 2)
B. (-1, 2, -4)
C. (-1, -4, 2)
D. (-4, 2, -1)
Answer: B
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
Prepare a probability distribution for the experiment. Let x represent the random variable, and let P represent the probability.Three coins are tossed, and the number of heads is noted.
A. 
B. 
C. 
D. 
Mathematics
Simplify.(8 + 6)2
A. 44 B. 100 C. 70 D. 196
Mathematics
Complete.44 qt = gal
A. 22 B. 11 C. 88 D. 176
Mathematics