Find a number b such that the three lines in the xy-plane given by the equations y = -x + b, y = 10x - 10, and y = -20x + 50 have a common intersection point.
A) 10
B) 9
C) 11
D) 12

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The Answer of Find a number b such that the three lines in the xy-plane given by the equations y = -x + b, y = 10x - 10, and y = -20x + 50 have a common intersection point.
A) 10
B) 9
C) 11
D) 12

Find a Number B Such That the Three Lines in the Xy-Plane