In the diagram below, AD bisects ZCAB, m ADB = 99° and mZCAB = 60°. Find mZB.
C
D
999
60
A
B

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step-by-step explanation:

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as we don't know if g(x) is continue,

answer b

f(x)=2x²-8x+1=2(x²-4x+4)+1-8=2(x-2)²-7

vertex is (2,-7) ( a minimum since coefficient of x² is > 0)