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Prove that the sqrt(2) is irrational

To do this we will assume sqrt(2) is rational , a fraction, which means: 2 1/2 = m/n ; m,n belong to integers. Also, m/n is an irreductible fraction , meaning m and n have no common divisors. 2 1/2 = m/n &lt...
JC
Answered by Joao C. • Maths tutor
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Expand and simplify 2(a + 3) + 5(a – 1)

Firstly we will start by expanding the brackets. We will do 2 a + 2 3 for the first bracket, then we will do 5 a + 5 (-1) for the second bracket which will give us 2a + 6 + 5a - 5. We will then simplify what...
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Answered by Serena B. • Maths tutor
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How can I get 8 points out of 8 in Question d of the Economics HL Paper 2?

It is important that you always get back to article and you develop the arguments mentioned. If for example, you get a question on how to cure a curernt account deficit, I would suggest to: 1. Read carefully...
GE
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I don't understand why carbon forms 4 bonds but nitrogen doesn't form 5.

Carbon has 4 electrons in its outer shell, a pair in the 2s and two unpaired electrons in the 2p. For covalent bonds to form, each atom must donate one unpaired electron. Carbon makes four bonds because it c...
RH
Answered by Ryan H. • Chemistry tutor
16317 Views

Explain 2 features of a pluton/surrounding country rock that may influence the width of themetamorphic aureoles

When a pluton (essentially a large pocket of magma) intrudes into rock, the heat from the pluton 'bakes' the surrounding rock- remember that heating a rock to high temperatures will initiate contact metamorp...
DS
Answered by Demi S. • Geology tutor
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