Use modular arithmetic to find the answer.Find all x such that x ? 0 (mod 5).
A. x = 5
B. x = 6k, k is an integer
C. x = 5k, k is an integer
D. x = 7k, k is an integer
Answer: C
Mathematics
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Construct a truth table for the statement.~(s ? t) ? ~(t ? s)
A. 
| T | T | F |
F T F
F F T
B.
| T | T | F |
F T T
F F F
C.
| T | T | F |
F T T
F F F
D.
| T | T | F |
F T F
F F F
Mathematics
Solve the problem.Express 75° as ? - ?, where sin ? and sin ? are known exactly.
A. 105°- 30° B. 145°- 70° C. 90°- 15° D. 120° - 45°
Mathematics
Indicate whether the statement is true always, sometimes, or never.The sum of two imaginary numbers is an imaginary number.
A. Always B. Sometimes C. Never
Mathematics
Change the given quantity to the indicated unit. Round the answer to the nearest tenth of the unit if necessary.21 L ? pt
A. 44.5 pt B. 19.1 pt C. 44.1 pt D. 50.4 pt
Mathematics