#### Answer

a. $\quad 3$
b. $\quad 4$
c. $\quad 1$
d. $\quad$ No like terms.

#### Work Step by Step

a.
The terms of an algebraic expressions are those parts separated by addition.
It can be a number, a variable, or a number times one or more variables.
In $ 4y+1+3x$, three terms are separated by addition
b.
The numerical part of a term is called its coefficient.
If a term is written without a coefficient, the coefficient is understood to be 1
The numerical coefficient of $4y$ is $4.$
c.
A term that consists of just a number is called a constant term.
In $4y+1+3x$, the constant term is $1$.
d.
The parts of each term that are multiplied are called the factors of the term
Like terms are terms that have exactly the same variable factors.
In $4y+1+3x,$ no two terms have identical variable factors.