Evaluating Expressions SOL 7.11 2018

Front

What is the process for evaluating an expression with given variable values?

Back

To evaluate an expression, substitute the given values for the variables into the expression and then perform the arithmetic operations according to the order of operations (PEMDAS/BODMAS).

Front

What does the acronym PEMDAS stand for in the context of evaluating expressions?

Back

PEMDAS stands for Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). It is the order of operations used to evaluate expressions.

Front

How do you evaluate the expression 4h + 2g + 4 when h = 9 and g = 3?

Back

Substitute h = 9 and g = 3 into the expression: 4(9) + 2(3) + 4 = 36 + 6 + 4 = 46.

Front

What is the value of the expression 2x + 3 + x^2 when x = 4?

Back

Substitute x = 4 into the expression: 2(4) + 3 + (4^2) = 8 + 3 + 16 = 27.

Front

How do you find the value of x^2 + y^2 + x - y when x = -1 and y = 3?

Back

Substitute x = -1 and y = 3 into the expression: (-1)^2 + (3)^2 + (-1) - (3) = 1 + 9 - 1 - 3 = 6.

Front

What is the result of evaluating the expression 5a + 7a - 8 when a = 4?

Back

Substitute a = 4 into the expression: 5(4) + 7(4) - 8 = 20 + 28 - 8 = 40.

Front

What is the significance of substituting values into an expression?

Back

Substituting values into an expression allows you to compute a specific numerical result based on the defined variables.

Front

What is the difference between an expression and an equation?

Back

An expression is a combination of numbers, variables, and operations without an equality sign, while an equation states that two expressions are equal, containing an equality sign.

Front

What is the value of x^2 when x = 5?

Back

Substituting x = 5 gives: (5)^2 = 25.

Front

How do you simplify the expression 3x + 2x - 5?

Back

Combine like terms: 3x + 2x = 5x, so the simplified expression is 5x - 5.