Solve the system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.
A. x = 6, y = 8, z = 7; (6, 8, 7)
B. x = -6, y = 7, z = 12; (-6, 7, 12)
C. x = 6, y = 7, z = 8; (6, 7, 8)
D. inconsistent
Answer: C
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Solve the problem.Find the area bounded by y = 
, x = 0, y = 0, and x = 2.
A. 
sin-1 
B. sin-1 
C. 
tan-1 
D. 
tan-1 
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. 
Solve the problem.Sam and Chad are ticket-sellers at their class play. Sam is selling student tickets for $2.00 each, and Chad selling adult tickets for $5.50 each. If their total income for 24 tickets was $83.00, how many tickets did Sam sell?
A. 10 tickets B. 15 tickets C. 14 tickets D. 16 tickets
Determine where the given function is concave up and where it is concave down. f(x) = -x3 + 8x + 2
A. Concave down on (-?, 0), concave up on (0, ?) B. Concave up on (-?, 2), concave down on (2, ?) C. Concave down on (-?, 2), concave up on (2, ?) D. Concave up on (-?, 0), concave down on (0, ?)