Solve the system of equations by Gauss-Jordan elimination.
A. {(4, 2, -5)}
B. {(-5, 4, 2)}
C. {(-5, 2, 4)}
D. ?
Answer: D
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Find an equation of the circle with the given center and radius.Center at (0, 0); radius = 6
A. (x - 6)2 + (y - 6)2 = 36
B. x2 + y2 = 
C. x2 + y2 = 36
D. x2 + y2 = 6
Write an equation that models the described quantity. Specify what each variable represents.A barrel contains 100 gallons of water and is being filled at a rate of 5 gallons per minute.
A. t = 100g- 5, where g represents gallons of water and t represents time in minutes B. g = 5t + 100, where g represents gallons of water and t represents time in minutes C. t = 100g+ 5, where g represents gallons of water and t represents time in minutes D. g = 5t - 100, where g represents gallons of water and t represents time in minutes
Use the power rules for exponents to simplify. Write the answer in exponential form.
3
A. 55 B. 256 C. 255 D. 56
Perform the indicated operation(s), whenever possible.Let A = 
and B = 
. Find A - B.
A. 
B.
[-1]
C. 
D. 