Question

Identify the terms, like terms, coefficients, and constant terms.

$12-7k+9-k$

Short answer

Terms in given expression are $12,-7k,9,-k$.

Like terms in given expression are $-7k,-k$.

Coefficients in given expression are $-7,-1$.

Constants in given expression are $12,9$.

Step-by-step solution

Step-1- Terms 

$12-7k+9-k$

Parts of an expression that are added together are called terms.

Therefore, the terms in given expression are $12,-7k,9,-k$.

Step-2- Like terms

The term which has the same variable part are called like terms.

Therefore, the like terms in given expression are $-7k,-k$.

Step-3-Coefficients and constant terms

Number part of a term with a variable is called the coefficient.

Therefore, the coefficients in given expression are $-7,-1$.

Term independent of any variable are called constants, and the constants in given expression are $12,9$.