Find all solutions to the equation. Express the solution in degrees.cos x = -1
A. 360°n or 180° + 360°n
B. 90° + 360°n or 270° + 360°n
C. 360°n
D. 180° + 360°n
Answer: D
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = (-8x - 8y)5
A. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
B. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
c ? 0
C. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
c ? 0
D. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
Find the average value of 
What will be an ideal response?
Sketch the graph of the hyperbola. : y² - 2y - 4x² - 16x = 15
What will be an ideal response?
Solve the system of equations using substitution.
A. x = 0, y = 4; x = - 2, y = 2
or 
, 
B. x = 0, y = -4; x = 2, y = 6
or 
, 
C. x = 0, y = 4; x = 2, y = 6
or 
, 
D. x = 0, y = -4; x = - 2, y = 2
or 
, 