Question

Which of the following represents an "expression with a variable"?

Options

• (4 × 3) + 5

• 12 − 5

• 2n − 1

• 100 ÷ 10

Answer 1

2n−1

Explanation:

This is the only option that contains a variable (n) combined with constants.

The other options are purely numerical expressions that can be immediately evaluated.