Expressions and Equations Review

Front

What does it mean when an equation has a solution like x=3?

Back

There is only one solution (x=3).

Front

Solve the equation: 0.4(5x-12)+0.5x=15.2. What is x?

Back

x=8

Front

What is the first step to solve the equation: 3(x-9)=x+2?

Back

Distribute by multiplying by 3.

Front

If the perimeter of a rectangle is 42 inches, and one side is 5x while the other side is (x-3), what does x equal?

Back

x=3

Front

Simplify the expression for the perimeter of an equilateral triangle with a side of 1.5x-3.

Back

4.5x-9

Front

What is an expression?

Back

A combination of numbers, variables, and operators (like + and -) that represents a value.

Front

What is an equation?

Back

A mathematical statement that asserts the equality of two expressions.

Front

What does it mean to solve an equation?

Back

Finding the value(s) of the variable(s) that make the equation true.

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 a variable in mathematics?

Back

A symbol (often a letter) that represents an unknown value.