It is a combination of numbers and variables, linked together by mathematical functions.
For example sqrt(2y/3*7.34*pi) where y is some variable.
Given the value(s) of the variable(s) it is possible to evaluate (find the value of) the expression.
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A non-example of a numerical expression would be a statement or phrase that does not involve mathematical operations or numerical values. For example, "The cat is sleeping" is not a numerical expression because it does not contain any numbers or mathematical symbols. Another non-example could be "The sky is blue," as it also does not involve any mathematical operations or numerical values.
The numerical coefficient of 49n is n. It refers to the constant multiplicative factors that is attached to the mathematical expression variables.
A numerical expression is a mathematical phrase involving only numbers and one or more operational symbols. The following are some examples of numerical expressions. For example, the numerical expression 4 + 20 - 7 in the example above simplifies to the number 17.
A numerical expression in math terms has numbers and operations like for an example 1. 4+9 2. (8-2)+5
Is the value obtained when all the variables have been given their value and the expression has been calculated according to mathematical rules.