Do you say... -lol
-el oh el
-"laughing out loud"

-Iuh mao
-el em ay oh
-"laughing my --- off"
-other

What is the missing step in this proof ?

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

Arace is 10 kilometers long.markers will be placed at the beginning and end of the race course and at each 500 meter mark.how many markers are needed to mark the course for the race?