Q: What does a parenthesis mean in a mathematical expression without an operation?

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Yes, a mathematical expression can have no variables, but such an expression is usually not very useful. An example of a valid expression without variables is: 1+1=2

It is an algebraic expression

Yes. Expressions cannot be expressed without variables. There are numerical expressions for ex. 2 + 3 is an expression without variables.

8 + x 40 is not a valid mathematical expression.

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In Evaluating Expression first,replace each letter in the expression with the assigned value. second,perform the operations in the expression using the correct order of operations and the last you got the answer

Yes, a mathematical expression can have no variables, but such an expression is usually not very useful. An example of a valid expression without variables is: 1+1=2

A mathematical expression is a mathematical phrase that consist numbers variables and signs of operation example: x(variable) + 5(number)=7 so the value of x is 2 -Kennethn 10 yrs. old :]

It is an algebraic expression

Yes. Expressions cannot be expressed without variables. There are numerical expressions for ex. 2 + 3 is an expression without variables.

An expression is a collection of numbers and variables, along with mathematical operations, but without an equality (or inequality) symbol.

In math expression means when you have a number sentence without an equal sign.A mathematical or algebraic expression is a collection of terms that do not include an equality sign because it is not an equation. A mathematical or algebraic expression is a collection of terms that do not include an equality sign because it is not an equation.

Algebraic expression

An algebraic expression is a mathematical sentence that includes a variable but does not have an equal sign. for example: 2x is an algebraic expression 2x = 6 is an equation

expression or story problem if you are younger like 3rd-6th.

8 + x 40 is not a valid mathematical expression.

a collection of symbols that jointly express a quantity