Evaluating by Plugging In

Front

What does 'evaluating by plugging in' mean in mathematics?

Back

It refers to substituting a specific value for a variable in an expression or equation to find its value.

Front

Evaluate the expression when x = -5: -x + 13

Back

18

Front

Evaluate the expression when x = -8: -4(2x + 5) - 3x

Back

68

Front

Evaluate the expression when x = -2: 4x - 7 + 3x

Back

-21

Front

Evaluate the expression when x = 4: 3(x - 7) + 6

Back

-3

Front

What is the first step in evaluating an expression by plugging in a value?

Back

Identify the variable in the expression and determine the value to substitute.

Front

What is the result of substituting x = 0 in the expression 5x + 3?

Back

3

Front

If x = 1, what is the value of the expression 2x^2 - 4x + 1?

Back

-1

Front

What is the value of the expression when x = 3: x^2 - 2x + 1?

Back

4

Front

How do you handle negative values when plugging them into an expression?

Back

Substitute the negative value directly, ensuring to follow the order of operations.