Evaluating Expressions with Integers

Front

What is an integer?

Back

An integer is a whole number that can be positive, negative, or zero, but not a fraction or decimal.

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

Evaluate the expression: 3x - 11 when x = -2.

Back

-17

Front

What is the value of y in the equation y = 4x + 8 when x = -1?

Back

4

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 remembered by the acronym 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 a coefficient?

Back

A coefficient is a numerical factor in a term of an algebraic expression, such as the 3 in 3x.

Front

What does it mean to substitute a value in an expression?

Back

To substitute a value means to replace a variable in an expression with a specific number.

Front

Evaluate the expression: 5y + 2 when y = 2.

Back

12

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.