Express the graph shown using interval notation. Also express it as an inequality involving x.
A. [-4, 7]
-4 ? x ? 7
B. (-?, 7)
x < 7
C. (-4, 7]
-4 < x ? 7
D. [-4, 7)
-4 ? x < 7
Answer: D
Mathematics
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A. 
B. 
C. 
D. 
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A. 8 B. 1 C. 0 D. Undefined
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Solve the given equation by completing the square.4r2 + 20r = - 14
A. 
B. 
C. 
D. 
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Solve.The winning times (in seconds) in a speed-skating event for men can be represented by the formula 
where x represents the year, with x = 0 corresponding to 1920. (For example in 1992, x would be 
According to the formula, what was the winning time in 1964? Round to the nearest hundredth.
A. 43.65 sec B. 42.71 sec C. 2057.26 sec D. 44.59 sec
Mathematics