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Two shops have deals for purchasing pens: "3 for £2" and "5 for £3" . Mr. Papadopoulos wants to buy 30 pens for his class in school, which deal should he use if he wants to spend the least amount of money possible, and how much will he spend?

3 for £2,

he needs 30 pens so he needs to buy the deal 10 (30/3) times, meaning he needs to spend 10 * £2 = £20

5 for £3,

he needs 30 pens so he needs the deal 6 (30/5) times, meaning...

Answered by Stefanos R. • Maths tutor

2962 Views

Calculate, giving the answer as simply as possible, 7/12 + 1/12

7/12 + 1/12 = 8/12

8/12 can be simplified to 2/3

therefore the answer is 2/3 as this is the most simplified version of the fraction 8/12

Answered by Stefanos R. • Maths tutor

3415 Views

Explain why cyclohexene will react with bromine gas but benzene will not

Cyclohexene contains a double bond, which has a greater electron density than the system of pi-bonds present in a benzene molecule. This means that a dipole can be induced in the bromine molecule due to t...

Answered by Stefanos R. • Chemistry tutor

11780 Views

Prove the identity (4cos(2x))/(1+cos(2x)) = 4-2sec^2(x)

Write down the formulas involving cos2x and select the one which involves only cosine, this is because cosine (or derivations of it) is the only trigonometric function in this question. Substitute the cho...

Answered by Tegan N. • Maths tutor

13607 Views

How is a meander formed?

With distance downstream, the river gains more energy and a higher volume of water (as shown in Bradshaw's Model). Because the channel has increased in size, there is less friction. As the river erodes la...

Answered by Hettie B. • Geography tutor

15012 Views