Choose the correct LCD for the fractions in the equation: + = .
a. 27x
b. 3x
c. x
d. 9x
d. 9x
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Determine whether the relation is a function.{(-2, 2), (2, 9), (5, 8), (9, -4), (12, -5)}
A. Function B. Not a function
In a certain city there is a river running through the middle of the city. There are three islands and nine bridges as shown in the figure below.
Suppose there is a crossing charge of $1.00 every time one crosses a bridge. A tourist wants to start on the South Bank, stroll across each of the bridges at least once, and return to her hotel on the South Bank at the end of the trip. What is the cheapest possible cost of such a trip?
A. Such a trip is impossible. B. $18 C. $9 D. $10 E. none of these
Use a graphing utility to graph the polar equation.r = cos 
?
A. 
B. 
C. 
D. 
A large number of female llama were studied. It was found that this species of llama has a mean gestation period of 350 days with a standard deviation of 11 days. (Gestation period is defined as the time from conception to birth.) Use this to information to solve the problem.
What percent of llamas have a gestation periods between 328 and 372 inches?
A. 99.7% B. 47.5% C. 68% D. 95%