Solve the system by graphing. If the system is inconsistent and has no solution, state this. If the system is dependent, write the form of the solution for any real number x.y = x - 4y = -x + 16
A. (6, 10)
B. (12, 20)
C. (20, 12)
D. (10, 6)
Answer: D
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Provide an appropriate response.Plot the point 
and find other polar coordinates (r, ?) of the point for which: (a) r > 0, -2? ? ? < 0 (b) r < 0, 0 ? ? < 2? (c) r > 0, 2? ? ? < 4?
A. (a) 
, (b) 
, (c) 
B. (a) 
, (b) 
, (c) 
C. (a) 
, (b) 
, (c) 
D. (a) 
, (b) 
, (c) 
Solve.While traveling at a constant speed in a car, the centrifugal acceleration passengers feel while the car is turning is inversely proportional to the radius of the turn. If the passengers feel an acceleration of 10 feet per second per second when the radius of the turn is 50 feet, find the acceleration the passengers feel when the radius of the turn is 100 feet.
A. 7 feet per second per second B. 8 feet per second per second C. 6 feet per second per second D. 5 feet per second per second
Use a double-angle identity to find the exact value of the expression.
A. 
B. 
C. 
D. 
Graph the solution set of the inequality and write it in interval notation.-2x ? 8
A. [4, ?)
B. (-?, -4]
C. [-4, ?)
D. (-?, 4]