Which of the following expressions is NOT equivalent to 22/7?

To determine which expression is not equivalent to ( \frac{22}{7} ), we need to simplify each option and see which one does not equal ( \frac{22}{7} ).

Starting with ( \frac{22}{7} ), we know that:

• The fraction itself is about ( 3.142857 ) when evaluated as a decimal.

Now, let's evaluate each expression:

1. The first expression, ( 4 + \frac{1}{7} ), can be rewritten as ( \frac{28}{7} + \frac{1}{7} = \frac{29}{7} ). This does not equal ( \frac{22}{7} ).

2. The second expression, ( 3(7/1) + \frac{1}{7} ), simplifies to ( 21 + \frac{1}{7} = \frac{147}{7} + \frac{1}{7} = \frac{148}{7} ). This also does not equal ( \frac{22}{7} ).

3. The third expression, ( \frac{21}{7} + \frac{1}{7} ), simplifies