Evaluate Expressions

Front

Evaluate the expression a² - b² if a = 4 and b = 2.

Back

12

Front

If the cost of each CD is $14.25 and the shipping cost is $4.50, what is the total cost for ordering 4 CDs represented by the expression 14.25p + 4.50?

Back

61.5

Front

Evaluate 8a - b if a = 10 and b = 6.

Back

74

Front

Evaluate 2a + 4b if a = 10 and b = 6.

Back

44

Front

Translate the phrase '8 less than the product of 4 and a number' into an algebraic expression using m for the unknown number.

Back

4m - 8

Front

What is the definition of an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting variables with numbers.

Front

What is the order of operations used in evaluating expressions?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents an unknown value in an expression or equation.

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.