Use the Half-angle Formulas to find the exact value of the trigonometric function. tan 165°
A. -2 - 
B. 2 - 
C. 2 + 
D. -2 + 
Answer: D
Mathematics
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Solve the equation 
. Restrict your attention to the horizontal span of 0 to 5. Round your answer to two decimal places if necessary.
?
A. 1.32 B. 1.5 C. 2.77 D. 3.24
Mathematics
What quantity of a 40% acid solution must be mixed with a 10% solution to produce 300 mL of a 30% solution?
What will be an ideal response?
Mathematics
Find a quadratic function expressed in vertex form that models the data in the given table.
A. y = 2(x - 2009)2 + 5 B. y = 3(x - 2009)2 + 5 C. y = 3(x + 2009)2 + 5 D. y = 2(x + 2009)2 + 5
Mathematics
Calculate. Write answer in lowest terms.13
+ 10
A. 23
B. 13
C. 22
D. 24
Mathematics