(a)[1]
Express as a single fraction, in its simplest form, $\frac{1}{2x}+\frac{2}{5x}$.
(b)[2]
Simplify the expression $4(3x-2y+1)-(5x-3y+1)$.
(c)[3]
Solve $3x^2-x-5=0$, giving your answers accurate to 2 decimal places.
(d(i))[2]
Draw the graph for $x+2y=5$.
(d(ii))[1]
Shade the region specified by these inequalities and label it $R$. $x\le3$, $y\le4$, $y\le2x$, $x+2y\ge5$.