Question

Correct the following run-on sentence. The show begins at 7:30 make sure you're there before 7:15.

Answer 1

The show begins at 7:30. Make sure you're there before 7:15.

Or

The show begins at 7:30; make sure you're there before 7:15.

Answer 2

The show begins at 7:30, so make sure you're there before 7:15.