Solve.A water tank can be filled in 5 minutes and emptied in 8 minutes. If the drain is accidentally left open when the tank is being filled, how long does it take to fill the tank?
A. 15 min
B. 26 min
C. 3 min
D. 13.33 min
Answer: D
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Find the indicated probability.The table shows the year and political party of a random sample of students from a certain college.
Find the empirical probability that a student at the college is an Independent. Round your answer to the nearest thousandth.
A. 0.345 B. 0.115 C. 0.333 D. 0.328
Solve the problem.Find -x when x is 22
A. -22
B. 0
C. 22
D. 
The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using backward substitution.
Write the solution as an ordered pair, if possible.
A. (5, 4) B. No solution C. (6, 6) D. (7, 6)
Determine the real solutions to the system of nonlinear equations.x + y = 2x2 + y2 = -6y + 8
A. (2, 0), (-1, 3) B. (0, 2), (3, -1) C. (-2, 4), (1, 1) D. (4, -2), (1, 1)