evaluate expressions by substitution

Front

What does it mean to evaluate an expression by substitution?

Back

Evaluating an expression by substitution means replacing the variables in the expression with their given values and then calculating the result.

Front

Evaluate m² if m = 5.

Back

25

Front

Evaluate: 4y – 5 when y = 6.

Back

19

Front

Evaluate: 6h + 30 when h = 1/2.

Back

33

Front

Evaluate when a = 10: 2(a - 5) + 2.

Back

12

Front

Evaluate 7y - 3y when y = 2.

Back

8

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents a number that can change or vary.

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operations (like addition and multiplication) that represents a value.

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right) - often abbreviated as PEMDAS.

Front

Evaluate: 3x + 4 when x = 2.

Back

10