Add or subtract, as indicated.(x2 - 7xy + 5y2) + (9x2 - 3xy - y2) + (-6x2 + xy - y2)
A. 4x2 - 9xy + 5y2
B. 4x2 - 9xy + 3y2
C. 3x2 - 9xy + 7y2
D. 4x2 - 17xy + 3y2
Answer: B
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Identify the given number as "Rational", "Irrational", or "Not a real number". If the number is rational, give its exact value. If the number is irrational, give a decimal approximation to the nearest thousandth.
A. Irrational, -11.958 B. Not a real number C. Rational, -11.958 D. Irrational, 11.958
Solve the inequality, then graph the solution.3 ? 2t - 5 ? 7 
A. 4 ? t ? 6 
B. -6 ? t ? -4 
C. -6 < t < -4 
D. 4 < t < 6 
Find the x-intercepts for the parabola whose equation is given. If the x-intercepts are irrational, round your answers to the nearest tenth.y = x2 + 4x - 7
A. x-intercepts: none B. x-intercept: (4, 0) C. x-intercepts: (-2 ± 3.3, 0) D. x-intercepts: (-4, 0) and (3, 0)
Find the nth term of the given infinite series for which 
+ 
+ 
+ 
+ ...
A. 
B. 
C. 
D. 