Which method should be used to solve the system? Explain your answer, including a description of the first step.x2 - y2 = 9-2x - y = 6
What will be an ideal response?
Substitution should be used, because using elimination would mean introducing an xy term into the second equation unnecessarily. The second equation should be solved for y.
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Solve the problem.Find the area of the region between the curve x = e13t , y = 
e-12t, and the x-axis from t = 0 to t = ln 9.
A. 9 B. 13 C. 8 D. 12
Identify the terms in the polynomial.3a5 - 4x4 + 5
A. 3a5, 4x4, 5 B. 3a5, -4x4, 5x C. 3, a5, -4, x4, 5 D. 3a5, -4x4, 5
Factor out the greatest common factor, or a negative common factor if the coefficient of the term of greatest degree is negative.-5x2 + 15x
A. -5x(x - 3) B. -5x(x + 15) C. -5x2(x + 3) D. x(5x + 15)
Find the standard form of the equation of the ellipse with the given characteristics.
?
Center: 
; a = 3b; Foci: 
, where a - thr semimajor axis, b - semiminor axis.
?
A. 
B. 
C. 
D. 
E. 