Question

4) FRIDAY: An unknown quantity which is represented by a letter or a symbol is called _____

-extraneous
-a constant
-a variable
-None of these

Answer 1

A Variable

Explanation:

Variables are used to mark an unknown value. Common math problems ask you to solve for it.

For example in 5x+23=45, 'x' is the variable.

A constant is a number without a variable.

Brainilest Appreciated.