1. Expressions and Equations
Year 11 Mini-Assessment 15
FOUNDATION
Expressions and Equations

2. allow 1 arithmetic mistake 
9a – b  
 
x(18 – 24x) or 6(3x – 4x2) 
6x(3 – 4x)
allow 1 arithmetic mistake
4x x – 18 
7x – 8

3. 
4x = 32 
x = 8 
– 3 = 3x – 16 
13 = 3x 
13/3 = x

4. allow 1 arithmetic mistake fully correct numbers correct,
(3x – 4)(3x – 4) =
9x2 – 12x – 12x + 16
= 9x2 – 24x + 16
allow 1 arithmetic mistake
fully correct
numbers correct,
1 or both signs wrong
  fully correct
(x – 8)(x – 4)
follow through from part (b)
provided answer was a double bracket
x = 8 and x = 4