Solve.
x - 
= -6
A. x = -11
B. x = 13
C. x = 11
D. x = -13
Answer: A
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Determine from the graph whether the function has any absolute extreme values on the interval [a, b].
A.
| Absolute minimum only. |
B. Absolute minimum and absolute maximum.
C. Absolute maximum only.
D. No absolute extrema.
Solve the system.5x + 5y + z = -53x - 5y - z = -355x + y + 2z = -12
A. (-5, 5, 3) B. (-5, 3, 5) C. (5, 3, -5) D. No solution
Solve the problem.A study was conducted to compare the average time spent in the lab each week versus course grade for computer students. The results are recorded in the table below. By using linear regression, the following function is obtained: 
where x is the number of hours spent in the lab and y is the grade on the test. Use this function to predict the grade of a student who spends 16 hours in the lab. Round to the nearest tenth. Number of hours spent in lab Grade (percent) 10 96 11 51 16 62 9 58 7 89 15 81 16 46 10 51
A. 58.8 B. 72.6 C. 62.0 D. 54.8
Tell whether the given rational expression is proper or improper. If improper, rewrite it as the sum of a polynomial and a proper rational expression.
A. improper; 1 - 
B. improper; 1 + 
C. improper; -1 + 
D. proper