The vertex of a parabola occurs where the derivative of its equation is 0, so an equation associated with the equation of a parabola can be solved to find the x-coordinate of the vertex. Find the vertex of the parabola, given the equation of the parabola and its associated equation.Equation of parabola: f(x) = -(7 + 8x + 3x2); associated equation: 0 = -8 - 6x
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Express the relationship between a small change in x and the corresponding change in y in the form 
.y = sec-1
A. dy = -9x8sin
dx
B. dy = ex9x8sin
dx
C. dy = 9ex9x8sin
dx
D. dy = -9ex9x8sin
dx
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Use the fundamental identities to find the value of the trigonometric function.Find cos ?, given that tan ? = - 
and ? is in quadrant II.
A. - 
B. 
C. - 
D. 
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Subtract.6737 - 3334
A. 3363 B. 3493 C. 3903 D. 3403
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Evaluate the exponential expression.-123
A. -36 B. 1728 C. -1728 D. -1331
Mathematics