Answer:
b=1
Step-by-step explanation:
2a+1 =1
Subtract 1 from each side
2a+1-1 = 1-1
2a=0
a=0
Now find b from the second equation
b-a =1
b-0=1
b=1
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This is an independent event because picking on book at random has nothing to do with picking the next book at random. The probability is 1/7
Answer: 8.4
Step-by-step explanation:
15-6.6