Formulae
- A formulae is a mathematical rule
- You can write formulae using algebra
- This label shows a formula for working out the cooking time of a chicken
- You can write this formula using algebra using units
Working in out
- Substitute the values for u and t into the formula
- If you use brackets then you’re less likely to make a mistake
- This is really important when there are negative numbers involved
- Remember BIDMAS for the correct priority of operations
- You need to do:
- Indices
- Multiplication
- Subtraction
- Don’t try to do more than one operation on each line of working
Problem solved tips
- You are only given the dimensions of the rectangle
- You need to infer the height of the triangle
- The angle of the slope is x and the base of the triangle is 2x so the height of the triangle must be x. Write this dimension on your diagram
- Use these dimensions to write an expression for the area of the triangle