(a)[2]
Simplify the expression $4x + 3y + 2x - 8y$.
(b)[2]
Write down an expression for the total cost, in cents, of $x$ pens and $y$ rulers.
(c)[3]
Solve the equation $5(2x + 4) = 85$.
(d(i))[1]
Given $2^8 \times 2^m = 2^6$, determine the value of $m$.
(d(ii))[1]
Given $5^n \div 5^4 = 5^6$, determine the value of $n$.
(e)[6]
Write down a pair of simultaneous equations and solve them to find the value of $p$ and the value of $b$. You must show all your working.