Question

Which of the following option(s) is(are) NOT an algebraic expression?

• A. $2x+5$
• B. $5x+3y$
• C. $7y$
• D. $9$
• E. None of the above

Answer 1

The correct option is E None of the above

$\underset{–}{\text{Algebraic Expression:}}$
An expression, which includes variable(s) and respective coefficient(s), constants along with algebraic operations.
For example: $5x-3$


Let's take a look at each choice separately.

$\underset{–}{2x+5:}$
$\bullet$ Variable: $x$
$\bullet$ Coefficient: $2$
$\bullet$ Constant: $5$
$\bullet$ Arithmetic operation: $+$
It has all of the necessary components to be an algebraic expression. As a result, it's an algebraic expression.

$\underset{–}{5x+3y:}$
$\bullet$ Variables: $x$ and $y$
$\bullet$ Coefficients: $5$ and $3$
$\bullet$ Arithmetic operations: $+$
It has all of the necessary components to be an algebraic expression. As a result, it's an algebraic expression.

$\underset{–}{7y:}$
$\bullet$ Variable: $y$
$\bullet$ Coefficient: $7$
This is an algebraic expression as well. It is a constant polynomial and also a monomial since it only has one term.

$\underset{–}{9:}$
$\bullet$ Constant: $9$
This is an algebraic expression as well. It's called monomial since it only has one term.

As a result, each option qualifies as an algebraic expression.