How do you evaluate the expression at specific values of their variables

Answer 1

To evaluate an expression at specific values of variables, follow these steps:

1. Replace each occurrence of the variable in the expression with its corresponding value.
2. Perform any necessary mathematical operations (addition, subtraction, multiplication, division, etc.) according to the order of operations.
3. Simplify the expression as much as possible.

Here's an example with a specific expression and values:

Expression: 2x + y^2 - 5
Variable values: x = 3, y = 4

1. Replace x with 3 and y with 4 in the expression:
2(3) + 4^2 - 5

2. Perform the necessary mathematical operations:
6 + 16 - 5

3. Simplify the expression:
17

So, when x = 3 and y = 4, the expression 2x + y^2 - 5 evaluates to 17.