Find the solution set of the linear system. Identify inconsistent systems and dependent equations. For dependent equations, write your answer as an ordered triple in terms of z.
A. {(-4, -1, 5)}
B. {(-1, -4, 5)}
C. {(5, -1, -4)}
D. {(-4, 5, -1)}
Answer: C
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Solve the problem.Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students. What is the bottom cutoff for an A grade? Round your answer to the nearest whole number.
A. 79 B. 90 C. 80 D. 82
Solve the problem.A weather forecaster has predicted a high temperature of 20°C for tomorrow. Find this temperature in degrees Fahrenheit. If necessary, round to the nearest tenth of a degree.
A. 43.1°F B. 68°F C. 4°F D. -20.9°F
Determine algebraically whether the function is even, odd, or neither.f(x) = 
A. even B. odd C. neither
Simplify. Write your answers in the form of a+bi, where a and b are real numbers.
+ 
A. 
+ 
i
B. - 
+ 
i
C. 
- 
i
D. - 
- 
i