Express as a single logarithm and, if possible, simplify.
ln x - ln 4
A. ln(
- 4)
B. ln
C. ln 
D. ln
Answer: D
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Multiply. Express the product in lowest terms.
? 
A. 
B. 
C. 
D. 
Use the properties of the trigonometric functions to find the exact value of the expression. Do not use a calculator.sec2 40° - tan2 40°
A. 0 B. 2 C. -1 D. 1
The graph is a translation of one of the basic functions defined by y = x2, y = x3, y = 
, or y = 
. Find the equation that defines the function.
A. y = (x + 5)2 B. y = (x - 5)2 + 2 C. y = (x - 5)2 D. y = x2 - 5
Sixty liters of a 43% acid solution is obtained by mixing a 28% solution with a 42% solution.Use a graphing utility to graph the two given equations. Let x and y represent the amounts of the 28 % solution and 42% solution. As the amount of the 28% solution increases, how does the amount of the 42% solution change?
?
?
?
A. ?
?
Increases
B. ?
?
Decreases
C. ?
?
Decreases
D. ?
?
Decreases
E. ?
Increases