Find the directrices of the ellipse.144x2 + y2 = 144
A. x = ± 
B. y = ± 
C. y = ± 
D. x = ± 
Answer: C
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Find the product.-12ax2(9ax3 - 8x2 + 4a)
A. -108a2x5 + 96ax4 B. -108ax3 + 96x2 - 48a C. -108a2x5 - 8x2 + 4a D. -108a2x5 + 96ax4 - 48a2x2
Solve the equation. Identify the equation as an identity, an inconsistent equation, or a conditional equation.28m + 16 = 4(4m - 23)
A. Conditional, {6} B. Identity, {all real numbers} C. Inconsistent, ? D. Conditional, {-9}
Use an inverse function to find all approximate solutions to the equation. 5 tan x + 6 = 0
A. x = 4.0177 + n?, for integers n B. x = 2.2655 + n?, for integers n C. x = 2.2655 + n?, x = 4.0177 + n?, for integers n D. x = 0.8761 + n?, for integers n
Solve the triangle. Round lengths to the nearest tenth and angle measures to the nearest degree.b = 6, c = 9, A = 127°
A. a = 16.4, B = 23°, C = 30° B. a = 19.3, B = 19°, C = 34° C. a = 13.5, B = 21°, C = 32° D. no triangle