Solve using the substitution method. Use a graphing calculator to check your answer. x + 2y = 196x + 12y = 114
A. (0, 0)
B. (6, 6)
C. No solution
D. Infinitely many solutions
Answer: D
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Write the number in scientific notation.5,600,000
A. 5.6 × 106 B. 5.6 × 105 C. 5.6 × 10-6 D. 5.6 × 10-5
Divide. Write the answer in lowest terms and as a whole or mixed number where possible.
÷ 
A. 9
B. 
C. 
D. 
Complex numbers are used in electronics to describe the current in an electric circuit. Ohm's law relates the current in a circuit, I, in amperes, the voltage of the circuit, E, in volts, and the resistance of the circuit, R, in ohms, by the formula 
Solve the problem using this formula.Find E, the voltage of a circuit, if I = (8 + 9i) amperes and R = (4 + 7i) ohms.
A. (92 - 31i) volts B. (92 + 31i) volts C. (-31 + 92i) volts D. (-31 - 92i) volts
Solve for the variable.12(9x - 8) = 5x - 8
A. x = 
B. x = 
C. x = - 
D. x = 