Use Gauss-Jordan elimination to solve the linear system and determine whether the system has a unique solution, no solution, or infinitely many solutions. If the system has infinitely many solutions, describe the solution as an ordered triple involving variable z.x + y + z=92x - 3y + 4z=7x - 4y + 3z=-2
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Middletown is designing a new high-speed rail system to connect Downtown, the Airport, and the Mall. The elevated tracks for the rail system will run along the existing roads, that run on a grid as shown below. In addition, a central switching station must be located at one of the intersections.
What is the length of the optimal network?
A. 7 blocks
B. 8 blocks
C. 5 + 
blocks
D. 9 blocks
E. none of these
Mathematics
What is the sum of the measures of the angles of a decagon?
What will be an ideal response?
Mathematics
Multiply or divide as indicated.
A. 5 B. 10 C. 10.457 D. 5.5143
Mathematics
Find the product.
A. 
B. 
C. 
D. 
E. 
Mathematics