Identify parts of an Algebraic Expression

In the expression $$2x + 3y - 4$$ , what are 2 and 3 called?

What is the term for a number that is multiplied by a variable in an algebraic expression?

A ___ is a symbol used to represent a quantity that can change.

What part of an algebraic expression is separated by addition or subtraction?

A ___ is a number that does not change in an expression.

In the expression $$5x + 7$$ , what is the coefficient of $$x$$ ?

What do we call the parts of an expression that are added or subtracted?

In the expression $$3a + 4b - 2$$ , what is the constant?

What is the coefficient in the expression $$6y - 9$$ ?

In the expression $$x + 2y + 3$$ , how many terms are there?