Solve the variation problem.The pressure of a gas varies jointly as the quantity of the gas (measured in moles) and the temperature and inversely as the volume of the gas. Suppose that the pressure of a particular gas is 
(kPa) when the quantity is 
the temperature is 
and the volume is 
Find the pressure of that gas when the number of
moles is 9, the temperature is 
and the volume is 
A. 1296 kiloPascals
B. 648 kiloPascals
C. 1200 kiloPascals
D. 696 kiloPascals
Answer: B
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Rationalize the denominator.
A. 
B. 
C. 
D. 
Solve the absolute value equation.
= -6
A. x = - 
B. x = - 
, 
C. no solution
D. x = 
Match the equation with the correct graph.y = 3x2 + 12x + 9
A. 
B. 
C. 
D. 
Entomologists have discovered that a linear relationship exists between the number of chirps of crickets of a certain species and the air temperature. When the temperature is 60° F, the crickets chirp at the rate of 120 times/minute, and when the temperature is 70° F, they chirp at the rate of 150 times/minute. Find an equation giving the relationship between the air temperature T and the number of chirps/minute N of the crickets. ?
A. 
B. 
C. 
D. 
E. 