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. {(2, -1, -9)}
B. {(-2, -1, 9)}
C. {(2, -1, 9)}
D. {(-2, -1, -9)}
Answer: B
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Solve the problem.The Blood Alcohol Concentration (BAC) of a person who has been drinking is given by the formula BAC = 
- (hours of drinking × 0.015).For example, the BAC for a 150-lb man who in two hours has drunk two 12-ounce beers , each having a 3.3 percent alcohol content isBAC = 
- (2 × 0.015).Find the BAC for a 170-lb man who in three hours has drunk 5 12-ounce beers, each having a 3.8 percent alcohol content.
A. 0.067 B. 0.078 C. 0.054 D. 0.056
Determine whether the statement is true or false.18 > 9
A. True B. False
Find the length of the section represented by x in the figure. 
a = 1
b = 6
A. 6
B. 13
C. 2
D. 2
Solve the system using substitution.
A. (0, 4) B. no solution C. (5, 0) D. all ordered pairs that solve 5x + y = 4