Give two parametric representations for the equation of the parabola.y = x2 - 4x + 7
A. x = t, y = t2 + 4t + 7 for t in (-?, ?); x = t - 2, y = t2 + 3 for t in (-?, ?)
B. x = t, y = t2 + 4t + 7 for t in (-?, ?); x = t - 2, y = t2 - 3 for t in (-?, ?)
C. x = t, y = t2 - 4t + 7 for t in (-?, ?); x = t - 2, y = t2 + 3 for t in (-?, ?)
D. x = t, y = t2 - 4t - 7 for t in (-?, ?); x = t - 2, y = t2 - 3 for t in (-?, ?)
Answer: C
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If a flight is selected at random, find the probability that the flight will arrive on time.
A. 
B. 
C. 
D. None of the above is correct.
Use the reference angle to find the exact value of the expression. Do not use a calculator.tan 
A. 
B. -
C. 
D. 
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A. True B. False
Evaluate the sum. Round to the nearest hundredth, if necessary. 
A. -0.35 B. 46 C. 0.35 D. 0.29