Solve the problem.The windchill temperature was -
, and the actual temperature was 
Find the difference between the actual temperature and the windchill temperature.
A. 17°
B. 30°
C. 15°
D. 9°
Answer: C
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Solve the problem.List all possible proper subsets of the set {2, 6, 7}.
A. ?, {2}, {6}, {7}, {2, 6}, {2, 7}, {6, 7} B. {2}, {6}, {7}, {2, 6}, {2, 7}, {6, 7} C. {2}, {6}, {7}, {2, 6}, {2, 7}, {6, 7}, {2, 6, 7} D. ?, {2}, {6}, {7}, {2, 6}, {2, 7}, {6, 7}, {2, 6, 7}
Solve the equation.
?
?Round your answer to four decimal places.
?
A. 
B. ?
C. ?
D. ?
E. ?
Find the expected value.A fair coin is tossed three times, and a player wins $3 if 3 tails occur, wins $2 if 2 tails occur and loses $3 if no tails occur. If one tail occurs, no one wins. What is the expected value of the games?
A. $0.75 B. $2.00 C. -$3.00 D. $3.00
Provide an appropriate response.Suppose that you are solving a system of 3 linear equations in 3 variables by the row echelon method. If you use the transformation -10R2 + R1, which row or rows of the augmented matrix, if any, will change?
A. Row 1 B. Rows 2 and 1 C. Row 2 D. None