Solve the inequality graphically.x2 + 2x ? 3
A. (-?, -3]
B. [1, ?)
C. (-?, -3] ? [1, ?)
D. [-3, 1]
Answer: C
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 9x2 - 5y2
A. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: ellipses 
B. Domain: all points in the xy-plane; range: all real numbers; level curves: hyperbolas 
C. Domain: all points in the first quadrant of the xy-plane; range: all real numbers; level curves: hyperbolas 
D. Domain: all points in the xy-plane; range: all real numbers; level curves: ellipses 
Graph the function.y = 
A. 
B. 
C. 
D. 
In the problem, t is a real number and P = (x, y) is the point on the unit circle that corresponds to t. Find the exact value of the indicated trigonometric function of t.(- 
, 
)Find cot t.
A. - 
B. 
C. - 
D. 
Determine the domain and the range of the function.f(x) = -4x2 - 2x - 8
A. domain: all real numbers
range: 
B. domain: all real numbers
range: 
C. domain: all real numbers
range: 
D. domain: all real numbers
range: 