1. 7. Formulae
Write and use simple algebraic formulae c
Substitute positive numbers into algebraic formulae b
Derive a one step formulae by solving a problem a
Substitute positive numbers into more difficult algebraic formulae c
Derive a two-step formulae by solving a problem c
Derive a formula based on the area of a shape c
Write more complex formulae a
Reference Material
Text book: section 7.6
MEP: KS4 book 2

2. Write and use simple algebraic formulae 5c
Substitute positive numbers into algebraic formulae b
a) Perimeter = b + b + a + c + a = 2a + 2b + c
b) p = 2a + 2b + c
a = 2, b = 3, c = 5
p = 2x2 + 2x3 + 5
= = 15
Perimeter is 15 cm
26 May 2019

3. Write and use simple algebraic formulae 5c
Substitute positive numbers into algebraic formulae b
Charge = £ 20 + £8 per hour
C = h where C is the total cost
h is the number of hours
26 May 2019

4. Find the area of a trapezium where a = 20cm, b = 10cm and h = 5cm
Substitute positive numbers into more difficult algebraic formulae 6c a h b
Area of a trapezium = ½(a + b)h
Find the area of a trapezium where a = 20cm, b = 10cm and h = 5cm
Area = ½( ) x 5
= ½ x 30 x 5
= 15 x 5
= 75 cm²
26 May 2019