Equations and Expressions

Front

What is an equation?

Back

An equation is a mathematical statement that asserts the equality of two expressions, typically containing variables and constants.

Front

What is an expression?

Back

An expression is a combination of numbers, variables, and operators (like +, -, *, /) 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 variables with numbers.

Front

What is a variable?

Back

A variable is a symbol (often a letter) that represents an unknown value in an equation or expression.

Front

What does '25% of $20' mean?

Back

It means to find one quarter of $20, which is $5.

Front

How do you translate '8 less than y'?

Back

It translates to the expression 'y - 8'.

Front

What is the formula to find a percentage of a number?

Back

The formula is (percentage/100) * total number.

Front

How do you write '10 cubed' as a product of the same factor?

Back

It is written as 10 x 10 x 10.

Front

What is the solution to the equation 15 - m when m = 7?

Back

The solution is 8.

Front

What does it mean to solve an equation?

Back

To solve an equation means to find the value of the variable that makes the equation true.