Write the expression in the form a + bi.
A. 
+ 
i
B. - 
+ 
i
C. - 
- 
i
D. 
- 
i
Answer: D
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Identify the number as prime, composite, or unit.374
A. Composite B. Unit C. Prime
Use a graphing calculator to find the sum of the geometric sequence. Round answer to two decimal places, if necessary.-2 - 6 - 18 - 54 - 162 - ... - 2 ? 37
A. -6560 B. -6580 C. -6558 D. -6523
Use the properties of equality to solve the equation.
n = 10
A. 15
B. 
C. 
D. 
Use a graphing utility to solve the system of equations. Express the solution rounded to two decimal places.
A. x = 1.81, y = 0.28; x = 0.20, y = 2.45; x = -0.20, y = -2.45 or (1.81, 0.28), (0.20, 2.45), (-0.20, -2.45) B. x = 1.99, y = 0.13; x = 1.04, y = 1.70; x = -0.91, y = 2.95 or (1.99, 0.13), (1.04, 1.70), (-0.91, 2.95) C. No real solution exists. D. x = 1.18, y = 1.03; x = 1.07, y = 1.52; x = -0.91, y = 2.88 or (1.18, 1.03), (1.07, 1.52), (-0.91,2.88)