to find the value of a numerical or algebraic expression.
To find the value of a numerical expression, you simply perform the necessary calculations. For example, if the expression is 3 + 5 - 2, you would add 3 and 5, then subtract 2, resulting in 6.
To find the value of an algebraic expression, you substitute the given values for the variables and simplify. For example, if the expression is 2x + 3y and the values given are x = 4 and y = 2, you would substitute these values into the expression: 2(4) + 3(2). Multiplying and adding, you get 8 + 6 = 14. Therefore, the value of the expression 2x + 3y when x = 4 and y = 2 is 14.