Sometimes one value can be expressed as an expression of another value – these are called algebraic formulae.

There are in a year. How many months are there in ?

Annie works for a car cleaning company. She earns per day plus for each car she cleans per day. How much will Annie earn in a day if she cleans cars?

A holiday costs , plus a day. Which formula shows the cost of the holiday, for days?

A company exchanges foreign currency. They offer for each pound. On top of this, they charge a fee of . Which formula shows the cost, , in pounds of purchasing ?

A piece of wood measures . The length, , left over after cutting off is . Calculate the value of if .

To find the area of a triangle, we use the formula , where represents the length of the base and is the height of the triangle. Use the formula to find if and .

This formula , links:

initial velocity ( )

final velocity ( )

acceleration ( )

time ( )

What is the value of if , and ?

The formula for the area of a rectangle, , which is in length and in width is . What is the value of if ?

The formula for the volume, , of a cuboid is . represents the cuboid's length, is its width and is its height. What is the formula for ?

The formula for the distance a stone falls under the influence of gravity is: , where is the distance, is the gravitational acceleration, and is the time that the stone falls. Write the formula for in terms of and ?