Question

Identify the variables in this Algebraic Expression
X+ 4y - 9

Answer 1

The expression
`x + 4y - 9` has two variables x and y.

Explanation:

What is a variable?

A variable is a letter, for instance
`x` or
`y`, that represents an unknown number.

Given the expression

`x + 4y - 9`

The given expression has three terms which are x, 4y, and -9.

Here:

• The term 'x' is the unknown variable x.

• The term '4y' has a coefficient (the number next to a variable y) of 4.

• The term '-6' is a constant.

As we already know that a variable is a letter, for instance x or y, that represents an unknown number. In other words, the values of x, or y are unknown to us.

Thus, the expression
`x + 4y - 9` has two variables x and y.