Evaluating Expressions

Front

Evaluate the expression: ½(10p - 7q) if p = 9 and q = 2

Back

38

Front

Evaluate the expression: (12xy)/(x - y) if x = 3 and y = -1

Back

-9

Front

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

Back

12

Front

Evaluate the expression: 2x + 5(y - 1) when x = 8 and y = 5

Back

36

Front

Evaluate the expression: -7w² + 2w if w = -4

Back

-120

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

Front

What does it mean to evaluate an expression?

Back

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

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 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).

Front

What is the difference between an expression and an equation?

Back

An expression is a mathematical phrase that does not include an equality sign, while an equation is a statement that two expressions are equal.