Use Gaussian elimination and matrices to solve the system of linear equations. Write your final augmented matrix in triangular form and then solve for each variable using back substitution.x - y + 4z=164x + z= 5x + 5y + z=25
A. (0, 4, 5)
B. (5, 4, 0)
C. (0, 5, 4)
D. (5, 0, 4)
Answer: A
Mathematics
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A. ?, for all x B. 4 C. 0 D. 2
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A. 252 B. 246 C. 227 D. 72
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Find the distance d(P1, P2) between the points P1and P2.P1 = (3
, 2
); P2 = (8
, -13
)
A. 1650
B. 5
C. 75
D. 5
+ 15
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Use the Half-angle Formulas to find the exact value of the trigonometric function. sin 165°
A. - 
B. - 
C. 
D. 
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