Writing & Evaluating Algebraic Expressions

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols. For example, 2x + 3 is an algebraic expression.

Front

What does it mean to evaluate an expression?

Back

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

Front

What is the value of the expression 3^4 + 9?

Back

90

Front

Evaluate 2n + 7 if n = 5.

Back

17

Front

If b represents the number of baseball cards Pete has, how would you express the number of cards Perry has if he has 17 fewer?

Back

b - 17

Front

If DeShawn's age is n, and Brian is five years older than Mary, who is three times older than DeShawn, what expression represents Brian's age?

Back

3n + 5

Front

Translate: 42 less than a number x.

Back

x - 42

Front

What is a variable in algebra?

Back

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

Front

What is a constant in an algebraic expression?

Back

A constant is a fixed value that does not change. For example, in the expression 3x + 5, the number 5 is a constant.

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.