Math 8 - Expressions and Equations

Front

What is the algebraic expression for the difference of 3 times a number and 7?

Back

3n - 7

Front

How do you calculate the perimeter of a rectangle with length x and width 9?

Back

Perimeter = 2(length + width) = 2(x + 9) = 2x + 18

Front

Simplify the expression: -8(5b + 2) - 7(b - 5)

Back

-47b + 19

Front

Solve for a: 15 + a = -50

Back

a = -65

Front

Simplify the expression: 6 + 2(7x - 3)

Back

14x

Front

What is an algebraic expression?

Back

An expression that contains numbers, variables, and operations.

Front

Define a variable in mathematics.

Back

A symbol used to represent an unknown value, often denoted by letters like x, y, or n.

Front

What does it mean to simplify an expression?

Back

To reduce an expression to its simplest form by combining like terms and performing operations.

Front

What is the distributive property?

Back

a(b + c) = ab + ac; it allows you to multiply a single term by two or more terms inside a parenthesis.

Front

What is the difference between an equation and an expression?

Back

An equation states that two expressions are equal, while an expression does not include an equality sign.