Bobby,Billy, and Barry smith are each one year apart in age. The sum of their ages is greater than the age of their father , who
2 answers:
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Answer:
We are to find the error made by Sadie and then find the correct simplification.
The error Sadie made is that she wrote as
instead of
.
The square root of is
and so she could have further simplified.
The correct simplification is shown below: