Solve the system by the method of your choice. Identify systems with no solution and systems with infinitely many solutions, using set notation to express their solution sets.y = 18 - 5x5x + y = 28
A. {(12, 13)}
B. {(15, 3)}
C. {(x, y) 
}
D. ?
Answer: D
Mathematics
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Answer the question.Is f continuous at x = 4? 
A. No B. Yes
Mathematics
Simplify the expression. Assume that all variables are positive when they appear.
A. 16 B. 2 C. -2 D. not a real number
Mathematics
Solve the problem.A dual-beam search light is positioned to shine on a prison wall. The light is 5 feet from the wall and rotates clockwise. The light shines on point P on the wall when first turned on 
After t seconds the distance (in feet) from the beam on the wall to the point P is given by the function
Find the value for b if the light beam is to sweep the entire wall in 20 seconds.
A. 
B. 
C. 
D. 
Mathematics
Determine the average rate of change for the function.h(x) = - 
x - 3
A. 
B. - 
C. 3
D. -3
Mathematics