## Linear Equation

y = mx + c

I want to buy a bread maker which costs $400. Currently, I have $100 in my piggy bank and can only save $25 a week. How many weeks do I need to save before I can get my bread maker?

## Quadratic Equations

y = ax^{2} + bx + c

My school has a mini garden measuring 24 metres by 18 metres is to have a foot reflexology path installed around it, increasing its total area to 520 square metres. What is the width of the path to be built?

## Cubic Equations

y = ax^{3} + bx^{2} + cx + d

Tom wants to build a box using a sheet of cardboard measuring 40 cm by 30 cm. This box has to have a volume of 1872cm^{3}, what is the height of this box?