Simplify the expression.-4 + 9
A. -13
B. -5
C. 13
D. 5
Answer: D
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Use the graph of population change per year for a metro area to answer the question. 
In which year did the population of the metro area decrease the most?
A. 2005 B. 1995 C. 1997 D. 2000
Solve.If the resistance in an electrical circuit is held constant, the amount of current flowing through the circuit is directly proportional to the amount of voltage applied to the circuit. When 9 volts are applied to a circuit, 180 milliamperes of current flow through the circuit. Find the new current if the voltage is increased to 5 volts.
A. 4 milliamperes B. 120 milliamperes C. 100 milliamperes D. 324 milliamperes
Solve the equation. Write complex solutions in standard form.5x2 + 6 = x
A. 1 ± 
B. - 
, 
C. 
± i
D. 
± i
Find the exact value of the expression.sin 15°
A. 
B. - 
C. 
D. - 