Solve the problem.The winning times (in seconds) in a speed-skating event for men can be represented by the expression 
where x represents the year, with x = 0 corresponding to 1920. (For example in 1992, x would be 
What would the winning time in 1982 be according to the model? Round your answer to the nearest hundredth.
A. 42.49 sec
B. 40.57 sec
C. 41.53 sec
D. 2878.29 sec
Answer: B
Mathematics
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If ?XWZ ? ?ZYX and ?XWZ + ?WZY = 180°, then WXYZ is a _______________.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve the problem.A local department store sold carpets in 4 sizes. Each carpet came in 3 qualities. One size of carpet came in 7 colors. The other sizes came in 3 colors. How many choices of carpet were there?
A. 57 B. 52 C. 55 D. 48
Mathematics
Solve.x2 - 18 = 1
A. 3
, -3
B. 
, - 
C. 
, -
D. 
, - 
Mathematics
Solve the equation.3x - 6 + 6x = 5x + 14 - 6x
A. {4} B. {1} C. {3} D. {2}
Mathematics