(a(i))[1]
The expression is $5a - 6a + 3a$.
(a(ii))[2]
The expression is $6x^2 - 6x - 4x^2 - x$.
(b)[2]
Find the value of $c^2 + d^2$ for $c = 7$ and $d = -5$.
(c(i))[2]
Make $m$ the subject of the formula.
(c(ii))[2]
Find the mass of a chicken that requires 83 minutes to cook.
(d)[3]
Solve the simultaneous equations below.