Algebra-1

To determine which of the given inequalities is correct when r ≤ 5, we need to evaluate each inequality.

Option A, r/2 ≤ 2.5

Given r ≤ 5

r/2 ≤ 5/2 (divide both sides by 2)

r/2 ≤ 2.5

This inequality is correct.

Option B, 3r ≤ 10

Given r ≤ 5

r × 3 ≤ 5 × 3 (multiply both sides by 3)

3r ≤ 15

This inequality would be 3r ≤ 15, not 3r ≤ 10. So, this inequality is not necessarily correct.