Simplify the expression. Write the answer with only positive exponents. All variables are nonzero.
-4
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.Crafty Bill's Cool Car Sales opened as a used car sales lot in 2006. The graph shows the number of cars sold f as a function of time t. Find and interpret f(2010). 
A. 600; Crafty Bill's Cool Car Sales sold 600 cars in 2010. B. 600; Crafty Bill's Cool Car Sales sold 600 cars in 2006. C. 650; Crafty Bill's Cool Car Sales sold 650 cars in 2010. D. 450; Crafty Bill's Cool Car Sales sold 450 cars in 2010.
Solve the equation for x.
= -2
A. {-1} B. {2} C. {-2} D. ?
Evaluate the function as indicated.Find f( 2) when f(x) = 
.
A. 
B. 
C. 
D. 
The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using backward substitution.
Write the solution as an ordered triple, if possible.
A. (2 + 6z, -5 - 2z, z) 
B. (2 - z, -5 + z, z) 
C. (2, -5, z) 
D. (2 - 6z, -5 + 2z, z) 