Intro to variables and algebraic expressions

Front

What is a variable in algebra?

Back

A variable is a symbol, usually a letter, that represents a number that can change or vary.

Front

What does the expression 7x + 6y - 9 represent?

Back

It represents a mathematical expression where 'x' and 'y' are variables, and 7, 6, and -9 are constants.

Front

How do you express 'more than' in algebra?

Back

You add the number to the variable, for example, 'x + 15' means 15 more than x.

Front

What is the product of 4 and p?

Back

The product is written as 4p.

Front

What does '4 less than 5' mean in algebra?

Back

It means you subtract 4 from 5, written as 5 - 4.

Front

What operation is represented by the '-' in the expression 4y - 8?

Back

The '-' represents subtraction.

Front

What is an algebraic expression?

Back

An algebraic expression is a combination of numbers, variables, and operations.

Front

What does the term 'constant' mean in algebra?

Back

A constant is a fixed value that does not change, like the number 9 in the expression 7x + 6y - 9.

Front

How do you write an expression for 'x decreased by 10'?

Back

You write it as x - 10.

Front

What is the difference between a variable and a constant?

Back

A variable can change, while a constant remains the same.