Solve the system.2x - y - 5z = -14-2x + 4y + 4z = 16-8x - 4y + z = -36
A. ?
B. {(-4, 2, 8)}
C. {(4, 4, 2)}
D. {(4, 2, 4)}
Answer: D
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Construct a truth table for the statement.~r ? ~q
A. 
| T | T | F |
F T F
F F F
B.
| T | T | F |
F T F
F F T
C.
| T | T | F |
F T T
F F T
D.
| T | T | T |
F T F
F F T
Solve the application and answer with a complete sentence.Pete studied 18
hours for his history test. Mike studied 4
hours for the same test. How much longer did Pete study than Mike?
A. Pete studied 13
hours more than Mike.
B. Pete studied 13
hours more than Mike.
C. Pete studied 13
hours more than Mike.
D. Pete studied 14
hours more than Mike.
Solve. If necessary, round percents to the nearest tenth, dollar amounts to the nearest cent, and all other numbers to the nearest whole.The enrollment at a local college increased 6% over last year's enrollment of 600. Find the increase in enrollment.
A. 360 students B. 564 students C. 36 students D. 636 students
Find the exact value of the expression.cos 
cos 
+ sin 
sin 
A. 1
B. 
C. 
D. 