Write the equation of the circle that satisfies the following conditions. Express the final equation in the form x2 + y2 + Dx + Ey + F = 0.Center at the origin and r = 3
A. x2 + y2 = 0
B. x2 - y2 - 9 = 0
C. x2 - y2 + 9 = 0
D. x2 + y2 + 9 = 0
E. x2 + y2 - 9 = 0
Answer: E
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For the given rectangular equation, write an equivalent polar equation.x - 10y = 0
A. tan ? = 10
B. tan ? = 
C. r = 10 tan ?
D. r = 
tan ?
Divide.(-15x3 - 34x2 - 21x - 10) ÷ (3x + 5)
A. -5x2 - 3x - 2 B. -5x2 - 2 C. x2 + 3x + 2 D. x2 - 3x - 2
Write an equation of the line through the given point with the given slope. Write the equation in slope-intercept form.(0, 4); m = 
A. y = 
x - 4
B. y = 
x + 4
C. y = 
x + 
D. y = 
x + 4
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 = 3.8 m, B = 35.4°
A. A = 54.6°, b = 5.3 m, c = 4.7 m B. A = 54.6°, b = 1.6 m, c = 4.1 m C. A = 54.6°, b = 5.3 m, c = 6.5 m D. A = 54.6°, b = 2.7 m, c = 4.7 m