Question

Find the additive inverse of -9 on the 12-hour clock

Answer 1

-9 does not exist on a 12 hour clock

Answer 2

so the question is ill posed. but what the writer meant was since \(12 - 9=3\) on the clock \(-9=3\)

Answer 3

now the question becomes, how many hours after 3 o’clock it is 12 o’clock?