They take the place of an unknown quantity. They can change values, thus they are called variables, their quantity varies.
Yes. Expressions cannot be expressed without variables. There are numerical expressions for ex. 2 + 3 is an expression without variables.
Basically the same way that you evaluate other types of expressions with variables: * You replace the variables by the value assigned to the variables. * Then you do the specified calculations.
An algebraic expression is a process for evaluating expressions. Replacing variables with numerals and following a standard order of operations is used for the process.
10 + B
Algebra.
it is the something
It is "evaluating".
Two expressions are "equivalent" if they have the same result for any values of the variable or variables.
The size can be limited to 6 variables and also can be used for simplifying boolean expressions. Is K-map a msnormer?
Equivalent Expression
Algebraic expressions may contain variables but they are not normally called variables. In fact, if they are related to identities, they need not be variable. For example, (4x2 + 8xy + 4y2)/(x + y)2 is an algebraic expression, but it is not a variable: it equals 4.
Replace the variables with the given values. Then you calculate using the order of operations.