Variables, Expressions and Equations SOL 5.19

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents an unknown number or value.

Front

What does the term 'expression' mean in math?

Back

An expression is a combination of numbers, variables, and operations (like addition or multiplication) that represents a value.

Front

What is an equation?

Back

An equation is a mathematical statement that shows that two expressions are equal, often containing an equal sign (=).

Front

How do you represent 'a number decreased by 54' in an equation?

Back

You can represent it as p - 54, where p is the number.

Front

What does '23 times a number' look like in algebra?

Back

It is represented as 23 x k, where k is the number.

Front

If Rick reads 28 pages each day, how do you find the number of days, n, to finish a 112-page book?

Back

You can use the equation 112 / n = 28.

Front

In the equation 2x = 6, what is the variable?

Back

The variable is x.

Front

What equation describes Francis's shopping situation if she had $20 and spent m dollars?

Back

The equation is 20 - m = 5.

Front

What is the solution to the equation x + 5 = 10?

Back

The solution is x = 5.

Front

How do you express 'the sum of a number and 10' in algebra?

Back

It is expressed as x + 10.