Parts of an Expression

A letter that represents an unknown number is called a _____

In the expression $$4x - 12$$ , what is $$4x$$ ?

x, y, a, s, t... These are called

How many terms are in the expression $$3a + 2b - c + 10$$ ?

How many terms are in the expression $$7y + 3 + 6k - 9$$ ?

A number that multiplies a variable is called a _____

A number on its own in an expression is called a _____

In the expression $$5x + 3y - 2$$ , what is $$3y$$ ?

In the expression $$2x + 4$$ , how many terms are there?

The expression $$x + 7 - 3x + 2$$ can be simplified to what?