In the algebraic term 5xy, the coefficient is the number which is 5
Then the coefficient is the number included in the term
The given expression is
[tex]3+5+7b-18a[/tex]We can simplify it first by adding the like terms as 3 and 5
[tex]\begin{gathered} 3+5=8 \\ 8+7b-18a \end{gathered}[/tex]We have 3 terms, 2 algebraic and 1 numeric
7b, -18a are algebraic
8 is numeric
The coefficients of the algebraic terms are 7 and -18
The numeric term has no coefficient
Then the answers are
7 and -18