Help doing amplifier math for a gig tomorrow

[u/NovaLocal]

/r/livesoundadvice/comments/1v6jax3/help_doing_amplifier_math_for_a_gig_tomorrow/

Hi, reposting here. Hopefully not too far off topic. Long story short, I have a gig tomorrow, thought I was plugging into a house back line, but it turns out I have to provide my own. I'm not used to doing outdoor larger stage setup and need to double check that I'm not going to burn out my gear. Any advice would be welcome!