what mathematicians agreed on an so that numercial expressions would have only one value?
No, it can contain variables.
A Numerical Expression is an expression only using numbers.
They do not apply to all expressions - only to those expressions whose elements are either real numerical constants or variables which can only take real values.The set of real numbers is closed under the operations of arithmetic. As a result each term in an expression, which will be made up of real constants or real variables, will also be a real constant or variable. And since each term in the expression is real, the closure implies that their combination is also real.
A expression that only contains numbers is a Numerical
no because it can also contain letters
No, not all expressions contain variables. An expression is a mathematical phrase that combines numbers, variables, and mathematical operations. A variable is a symbol that represents a quantity that can vary, such as x or y. Some expressions may only contain numbers and mathematical operations, such as addition, subtraction, multiplication, and division. For example, "3 + 5" is an expression that only contains numbers and the addition operation. However, an expression that contains at least one variable is known as an algebraic expression, and this type of expression is commonly used in algebra to represent mathematical relationships between variables. For example, "2x + 4" is an algebraic expression that contains the variable x and represents a linear equation in which y is equal to two times x plus four.
what mathematicians agreed on an so that numercial expressions would have only one value?
the order of operations
No, it can contain variables.
A Numerical Expression is an expression only using numbers.
They do not apply to all expressions - only to those expressions whose elements are either real numerical constants or variables which can only take real values.The set of real numbers is closed under the operations of arithmetic. As a result each term in an expression, which will be made up of real constants or real variables, will also be a real constant or variable. And since each term in the expression is real, the closure implies that their combination is also real.
A expression that only contains numbers is a Numerical
Algebraic expressions use letters as variables to represent numbers. Ex. 5c-(2+x) x=2 c=12 Numerical expressions use numbers only. Ex. 12+(2-7)
There are a few rules to perform arithmetic operations in binary numbers. According to those rules you can add or subtract binary numbers. There are only two arithmetic operations used in binary numbers, they are addition and subtraction.
it using the word x and y
There are no alphabets in any numbers. alphabets contain only letters (not numbers).