Solve the equation.5-x = 
A. {2}
B. 
C. {-2}
D. 
Answer: A
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Find the character of the roots.4x2 + 12x + 9 = 0
A. Exactly one rational solution B. Two different imaginary solutions C. Two different rational solutions D. Two different irrational solutions
Solve the right triangle shown in the figure. Round lengths to one decimal place and express angles to the nearest tenth of a degree. 
a = 1.5 cm, b = 1.2 cm
A. A = 38.7°, B = 51.3°, c = 1.9 cm B. A = 46.8°, B = 43.2°, c = 1.9 cm C. A = 51.3°, B = 38.7°, c = 1.9 cm D. A = 53.1°, B = 36.9°, c = 2.7 cm
Write the expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression.cos2 60° - sin2 60°
A. - 
B. 
C. 
D. - 
Write out all the terms of the series.
A. -x - 4x2 - 9x3 - 16
B. -x + 
- 
+ 
C. -x - 
- 
- 
D. -x + 
- 
+ 