Solve the quadratic equation using the quadratic formula.
x2 - 
x + 
= 0
A. 
B. 
C. 
D. 
Answer: B
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Simplify by writing the expression using only positive exponents.- 
A. 2y3
B. -2y3
C. 
D. - 
Use a half-angle formula to find the exact value of the expression.cos 
A. 
B. - 
C. 
D. - 
Use Bayes' rule to find the indicated probability.Two stores sell a certain MP3 players. Store A has 34% of the sales, 5% of which are of defective items, and store B has 66% of the sales, 1% of which are of defective items. The difference in defective rates is due to different levels of pre-sale checking of the product. A person receives a defective item of this product as a gift. What is the probability it came from store B?
A. 0.275 B. 0.22 C. 0.5667 D. 0.7083
Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.f(x) = -x2 - 2x - 4
A. minimum; 
B. minimum; 
C. maximum; 
D. maximum; 