A term is a single mathematical expression. We can see in this expression there are four terms, each separated by an operation:
8, 6t, -3t, and 1.
Coefficients are the numbers that multiply variables. You can also just think of them as the number in front of any variable. Here we see we have two terms with variables:
6t, -3t
and therefore our coefficients are:
6, -3
Constants are numbers that are, well, constant - you could also just think of them as "normal" numbers. We can see in this expression you have two:
8, 1
Like terms are terms of the same type. We have two like terms with a variable in them:
6t, -3t
and two like terms that are constants:
8, 1
