Simplify the expression by combining any like terms.2x - 9x
A. 11x
B. -7x
C. -18x
D. -7 + x
Answer: B
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Find the derivative of the function.g(x) = 
A. g '(x) = 
B. g '(x) = 
C. g '(x) = 
D. g '(x) = 
Evaluate the rational expression for the given value(s) of the variable(s).
for x = -9
A. 
B. 
C. 
D. 
Solve the equation. Use natural logarithms. When appropriate, give solutions to three decimal places unless otherwise indicated.eln 3x = eln(2x + 6)
A. 
B. 
C. {-6}
D. {6}
Solve.The force needed to keep a car from skidding on a curve varies jointly as the weight of the car and the square of the car's speed, and inversely as the radius of the curve. If a force of 
is needed to keep an 
car traveling at 20 mph from skidding on a curve of radius 
what force would be required to keep the same car from skidding on a curve of radius 
style="vertical-align: -4.0px;" /> at 
Round your answer to the nearest pound of force.
A. 27,041 lb
B. 26,339 lb
C. 26,471 lb
D. 26,503 lb