Question

Which of the following solutions are written in set notation? Select ALL that apply. (2 poin
(x=4}
(3)
口
{-15}
C-25
• 7

Answer 1

To identify which of the provided options are written in set notation, we need to recognize the format typically used to express a set. Set notation usually includes curly braces `{}` to enclose the elements of the set.

Let's examine the provided options:

1. **(x=4)** - This is not in set notation; it's an equation.
2. **(3)** - This is not in set notation; it is simply a number enclosed in parentheses.
3. **口** - This symbol does not represent set notation.
4. **{-15}** - This is written in set notation, containing a single element (-15).
5. **C-25** - This is not in set notation; it appears to be an expression.
6. **• 7** - This symbol is not representative of set notation.

Based on this analysis, the only option written in set notation is **{-15}**.