Solve the system by the elimination method. x + 8y = -1-4x + 9y = 4
A. {(-1, 0)}
B. ?
C. {(0, -1)}
D. {(1, -1)}
Answer: A
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Find the unit tangent vector of the given curve.r(t) = (4 sin3 9t)i + (4 cos3 9t)j
A. T = (sin 9t)i - (cos 9t)j B. T = (108 sin 9t)i -(108 cos 9t)j C. T = (4 cos 9t)i - (4 sin 9t)j D. T = (4 sin 9t)i - (4 cos 9t)j
Provide an appropriate response. Identify the equation y = -3x2 + 1 as linear, quadratic, or other.
A. other B. quadratic C. linear
Given the polynomial function f(x), find the rational zeros, then the other zeros (that is, solve the equation 
), and factor f(x) into linear factors.f(x) = x3 - 27x - 54
A. -3, multiplicity 2; -6; f(x) = 
(x + 6)
B. -3, multiplicity 2; 6; f(x) = 
(x - 6)
C. -6, -3, 3; f(x) = (x + 6)(x + 3)(x - 3)
D. -3, 3, 6; f(x) = (x + 3)(x - 3)(x - 6)
Write the polynomial in descending order and identify its degree.9 - 8x2 + 6x6 - 3x3 + x
A. 9 - 8x2 + 6x6 - 3x3 + x ; degree 6 B. 9 + x - 8x2 - 3x3 + 6x6 ; degree 6 C. 6x6 + x - 3x3- 8x2 + 9 ; degree 6 D. 6x6 - 3x3 - 8x2 + x + 9 ; degree 6