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 + z= 3 x - y + 4z= 92x + y + z=-1
A. (-4, 4, 3)
B. (4, 3, -4)
C. (4, -4, 3)
D. (-4, 3, 4)
Answer: D
You might also like to view...
Multiply. Simplify, if necessary.48 ? 
A. 
B. 40
C. 
D. 35
Find all cube roots of the complex number. Leave answers in trigonometric form.-6
- 6i
A. 
cis 70°, 
cis 190°, 
cis 310°
B. 
cis 70°, 
cis 190°, 
cis 310°
C. 
cis 70°, 
cis 190°, 
cis 310°
D. 
cis 80°, 
cis 200°, 
cis 320°
Substitute the given values into the formula and then evaluate to find the unknown quantity. Label units in your answer. If the answer is not exact, round your answer to the nearest hundredth.Find (a) the perimeter and (b) the area of a square with side lengths 
Use 
for perimeter and 
for area.
A. (a) 42 units (b) 441 units2 B. (a) 84 units (b) 441 units2 C. (a) 84 units (b) 42 units2 D. (a) 441 units (b) 84 units2
Solve.For three days on your vacation you drove 504 miles, 478 miles, 476 miles. What was the average daily miles driven?
A. 1458 mi B. 1459 mi C. 486 mi D. 487 mi