A plasterer uses this formula to work out how much she charges (£C).
C = 30 + 10A
A is the area to be plastered to the nearest square metre. How much does she charge for a rectangular ceiling measuring 7.6m by 2.4m?
The diagram shows three pieces of glass in a conservatory roof. Work out the height, \(h\), of the smallest piece.
A base for a shed has a volume of 3.8 cubic metres. 55% of the base is concrete. The rest is steel. A lorry delivers ready-mixed concrete in loads of 6 cubic metres. How many of these bases can be built with 5 loads of concrete?
A rectangle has length \(x\) cm and width \(y\) cm. You are given that \(x\) : \(y\) = 5 : 2
Work out an expression for the perimeter in terms of \(x\). Give your answer as simply as possible.