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?
y = ax2 + 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?
y = ax3 + bx2 + 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 1872cm3, what is the height of this box?