Question

When proving that the sum of two rational numbers is rational in the expression a+cbd
, which value could be used for a in order to apply the proof?(1 point)
Responses

3
3

3–√
Start Root 3 End Root

30
Start Fraction 3 over 0 End Fraction

π

Answer 1

To prove that the sum of two rational numbers is rational, you should choose a value for \( a \) that is rational.

In the provided options:

- \( 3 \) is a rational number.
- \( \sqrt{3} \) is not a rational number.
- \( 30 \) is a rational number.
- \( \frac{3}{0} \) is undefined.
- \( \pi \) is not a rational number.

Therefore, you can use either \( 3 \) or \( 30 \) for \( a \) in the proof.

However, as there is generally only one best option provided, the most straightforward and common rational number would be **3**.