compound measures

• Substitution means replacing letter or symbols in algebraic equations or expressions with numbers to find out their total value.
• speed = distance / time (m/s)
• average speed = total distance / total time
• distance = speed x time
• average speed= total distance/total time
• inverse proportion=

  y= k/x
• direct proportion= y=kx
• density = mass/volume (Mum Dad Vatican city)
• pressure= force/area (Paper Folded Area)