For the given amounts A and B, find the requested percent of change. Round to the nearest whole percent if necessary.A = 420, B = 70
Find the percent change if B changes to A.
A. 600%
B. -600%
C. 500%
D. -500%
Answer: C
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Solve.David recently switched to a long distance phone company which charges a monthly fee of $5.45 plus $0.06 per minute. A linear function that expresses the monthly bill B as a function of minutes used m is 
What are the independent and dependent variables?
A. The independent variable is the customer, and the dependent variable is B. B. The independent variable is B, and the dependent variable is m. C. The independent variable is 5.45, and the dependent variable is 0.06. D. The independent variable is m, and the dependent variable is B.
Perform the indicated operation and simplify. Assume all variables represent positive real numbers.
A. 
B. 
C. 
D. 
The graph of a function f is given. Use the graph to answer the question.For what numbers x is f(x) = 0?
A. (-6, 7) B. -6, 7, 10 C. -6 D. (-10, -6), (7, 10)
Solve the equation and check your solution.
= 
+ 
A. x = - 
B. x = 
C. x = 3
D. x = -3