Determine if the graph of the function opens upward or downward and whether it has a maximum or a minimum point.f(x) = -2x2 - 4x - 4
A. Upward, maximum
B. Downward, minimum
C. Upward, minimum
D. Downward, maximum
Answer: D
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Complete the sentence so the result is an identity. Let x be any real number.sin x = ( )(cos x)
A. cot x B. tan x C. csc x D. sec x
Use < or > for ? to write a true sentence. Draw a number line if necessary.890 ? 933
A. < B. >
Shade the solution set in the xy-plane.
+ 
? 1
+ 
? 1
A. 
B. 
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D. 
Use the following information. Chemists use the pH (hydrogen potential) of a solution to measure its acidity or basicity. The pH is given by the formula
, where
is the concentration of hydrogen ions in moles per liter. What value of
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?
A. 
B. 
C. 
D. 
E. 