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 + 2z=-32x + z= -4x + 5y + z=-29
A. (-4, 0, -5)
B. (0, -4, -5)
C. (-4, -5, 0)
D. (0, -5, -4)
Answer: D
Mathematics
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Simplify by using the order of operations. Round your answer to the nearest hundredth.6.01 ÷ 6.71 ? 4.49
A. 4.02 B. 8.98 C. 0.20 D. 17.21
Mathematics
Solve the equation for y.6x + 9y = 17
A. y = 
x + 
B. y = 
x - 
C. y = - 
x + 
D. y = 6x - 17
Mathematics
Perform the indicated conversion within metric units of length.0.87 kilometers to centimeters
A. 870 cm B. 8700 cm C. 87,000 cm D. 8.7 cm
Mathematics
Refer to right triangle ABC with 
.
?
?
If 
and 
cm, find b.
?
Apply the rules regarding the use of significant digits when determining your answer.
?
__________ cm
Fill in the blank(s) with the appropriate word(s).
Mathematics