Write and Evaluate 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, 4x + 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 order of operations in mathematics?

Back

The order of operations is a set of rules that dictates the sequence in which calculations are performed. It is often remembered by the acronym PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

Evaluate 4x + 3 if x = 2.

Back

11

Front

What does '30 less than a number' mean in algebraic terms?

Back

It means the expression n - 30, where n represents the number.

Front

What is a constant in an algebraic expression?

Back

A constant is a fixed value that does not change. In the expression 15p + 12, the constant is 12.

Front

What is a variable in an algebraic expression?

Back

A variable is a symbol, often a letter, that represents an unknown value. In the expression 15p + 12, p is the variable.

Front

Evaluate 6m + 4t if m = 5 and t = 3.

Back

42

Front

What is the coefficient in the expression 15p + 12?

Back

The coefficient is the number that multiplies the variable. In 15p, the coefficient is 15.

Front

How do you write 'the sum of a number and 5' as an algebraic expression?

Back

It can be written as n + 5, where n is the number.