Expressions and Equations Review

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 is an equation?

Back

An equation is a mathematical statement that asserts the equality of two expressions, typically containing an equal sign (=).

Front

How do you solve the equation r - 11 = 5?

Back

Add 11 to both sides: r = 5 + 11, so r = 16.

Front

Evaluate 3x - 7 if x = 12.

Back

3(12) - 7 = 36 - 7 = 29.

Front

What is the factored form of 9x + 12?

Back

3(3x + 4).

Front

Translate: Five more than a number.

Back

x + 5.

Front

What equation models Cheryl's pay situation if she earns $8 per hour and made $96?

Back

8h = 96.

Front

What is a variable in an expression or equation?

Back

A variable is a symbol (often a letter) that represents an unknown 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 the distributive property?

Back

The distributive property states that a(b + c) = ab + ac.