The worksheet shows an algebraic expression:

1. x + y = _______

To evaluate the expression $x + y$, we would need the values of $x$ and $y$. Could you provide the values for $x$ and $y$? If the worksheet doesn't specify values, this is typically meant as a general exercise in combining variables.

Would you like more clarification or additional help?

Here are 5 related questions to expand your understanding:

1. What happens to $x + y$ if $x = 3$ and $y = 5$?
2. Can you simplify $x + y + z$ if you are given $z = -2$?
3. How does $x - y$ differ from $x + y$ in terms of the operation?
4. If $x$ is doubled and $y$ is halved, how does the expression $x + y$ change?
5. What is the result of $2x + 3y$ if $x = 1$ and $y = 2$?

Tip: Always substitute given values into an expression before performing operations to avoid confusion!