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Bob buys 33 pens and 21 rulers for £6. A ruler costs 8 pence more than a pen. How much does one pen cost?

Let the cost of a pen = xLet the cost of a ruler = x+8Thus, (x*33) + ((x+8)*21) = £6 = 600 penceHence, 33x + 21x + 168 = 600 54x = 432 x = 8Therefore one pen costs 8 pence.
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Answered by George L. • Maths tutor
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How should I plan and structure my essays in exams?

When approaching an essay question in the exam you will not have the luxury of lots of time to plan a response so it's important you understand how best to attack the paper. FIRST read through all the questi...
XB
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given a map, describe the spatial variation in access to electricity?

As a general trend Northern regions (North of the Brandt line) have full access to electricity, such as in Western Europe and North America. Outliers to this trend South of the equator include Australia and ...
NG
Answered by Noa G. • Geography tutor
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Complete the square of x^2 + 10x -3

ax^2 + bx + c squared form: (x + p)^2 + qDivide b by two where here b=10 and then put this value into where p is in the squared form(x + 5)^2Multiply it outx^2 + 10x + 25Compare this with original equation a...
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Answered by Sajitha S. • Maths tutor
3811 Views

For a named country you have studied, describe the problems caused by overpopulation (8)

Country: Bangladesh In Bangladesh, one problem as a result of overpopulation is the lack of housing. There are often over 12 people that share a room in cities such as Dhaka, and there is not enough space to...
SA
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