Answer
a. Numerical.
b. Algebraic.
c. Numerical.
Work Step by Step
Algebraic Expression: a mathematical phrase that includes one or more variables.
Numerical Expression: a mathematical phrase involving numbers and operation symbols, but no variables.
a. The given expression is $7\div2$.
It involves two numbers and the operation symbol of division, but does not contain any variables. Therefore, this is a numerical expression.
b. The given expression is $4m+6$.
It contains a variable $m$, which allows us to conclude that this is an algebraic expression.
c. The given expression is $2(5-4)$.
It contains numbers and operation symbols, but no variables. Therefore, it is a numerical expression.
