Mathematics 0580 · IGCSE · Inequalities

Inequalities — practice question

A baker decorates $x$ small cakes and $y$ large cakes. Over the course of one day, he decorates: • at most 16 small cakes • fewer than 10 large cakes • more small cakes than large cakes • no more than 24 cakes altogether. One inequality that represents this information is $x \leq 16$.
(a)[3]

Write down the remaining three inequalities in $x$ and/or $y$.

(b)[6]

Using the grid, draw four straight lines and shade the regions that are not wanted to represent these inequalities. Mark the region, $R$, that satisfies all four inequalities.

(c)[2]

Use your diagram to find the greatest amount the baker can earn in one day by decorating cakes.

Worked solution & mark scheme

This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: $y<10$

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