Perform the indicated operations. +  - 

A.
B. - 
C. - 
D.

Answer: B

Mathematics

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Solve the problem.The van der Waals equation provides an approximate model for the behavior of real gases. The equation is P(V, T) =  - , where P is pressure, V is volume, T is Kelvin temperature, and a,b , and R are constants. Find the derivative of the function with respect to each variable.

A. PV = ; PT =  - 
B. PV = -  + ; PT = 
C. PV =  - ; PT = 
D. PV =  - ; PT = 

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Mathematics

Perform the indicated operation(s). Simplify if possible. + 7

A.
B.
C.
D.

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Mathematics

Decide whether the given number is a solution of the given equation.Is 8 a solution of 9 = 1 + x?

A. yes B. no

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Mathematics

Several computer stores reported differing prices for a toner cartridge for a laser printer. The prices are as follows: 59, 50, 77, 70, 71, 73, 54, 56, 70. Find the mode of the prices for a toner cartridge. ?

A. $69 B. $70 C. $71 D. $72 E. $68

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Mathematics