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. 5x - y + z = 8 7x + y + z = 6
A. no solution
B. (-z + 3, 4z + 7, z)
C. 
D. 
Answer: C
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Solve the problem.Find the average distance from a point 
in the annular region 
to the origin.
A. 
B. 
C. 
D. 
Solve the problem.A plane flies 430 miles with the wind and 310 miles against the wind in the same length of time. If the speed of the wind is 24 mph, what is the speed of the plane in still air?
A. 138 mph B. 148 mph C. 153 mph D. 173 mph
Solve the problem.How long would it take to drive a distance of 24 miles if you drive at a constant speed of 58 miles per hour? Round your answer to the nearest hundredth if necessary.(Distance = Speed × Time)
A. 0.41 hours B. 1392.0 hours C. 4.14 hours D. 2.42 hours
Solve the problem.A parallelogram has an area of 3x2 + 4x - 95. Use factoring to rewrite this expression.
A. (3x - 19)(x - 5) B. (3x + 19)(x - 5) C. (3x + 19)(x + 5) D. (3x - 19)(x + 5)