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Expand 2x(x-3)

2x 2 - 6x
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Answered by Alexandra D. • Maths tutor
14489 Views

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 he needs to spend 6 * £...
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Answered by Stefanos R. • Maths tutor
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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 later...
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Answered by Hettie B. • Geography tutor
15767 Views

When do you use etre to form the perfect tense of a verb?

There are a number of verbs which take etre as the auxiliary verb when forming the perfect tense. These are generally verbs showing movement or a change of state and a useful technique to remember them is MR...
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Answered by Hettie B. • French tutor
2993 Views

How do I know the gender of a noun?

In German, we have 3 different genders: masculine, feminine and neuter. Most of the time you simply have to learn off by heart which nouns are which gender, however there are some rules which can help. For i...
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Answered by Hettie B. • German tutor
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