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Prove that the square of an odd number is always 1 more than a multiple of 4. [Edexcel Higher Tier 2018, Paper 1: Question 12]

We want to start with “the square of an odd number” and show something. Remember that any odd number can be expressed as 2n+1 (an even number is 2n, and any odd number is 1 larger than an...

RH
Answered by Robert H. Maths tutor
2694 Views

How do i form the imperfect subjunctive tense?

First of all, it's important to remember that you wont be required to spontaneously conjugate verbs into the imperfect subjunctive at this level! You may have to identify them in texts, but you won't be a...

LE
Answered by Lauren E. Spanish tutor
1966 Views

What’s the difference between a eukaryote and a prokaryote?

A prokaryote will not contain membrane-bound organelles, whereas a eukaryotic cell will contain membrane-bound organelles.Examples of membrane bound organelles would be the nucleus, mitochondria and chlor...

CM
Answered by Camilla M. Biology tutor
2785 Views

How do i solve the simultaneous equations 7x+y=1 and 2x^2-y=3?

First, label the equations 1 and 2:1: 7x+y=1 and 2: 2x^2-y=3Rearrange equation 2 in terms of yy=2x^2-3Now substitue the rearranged version of equation 2 into 1 to give7x+2x^2-3=1.Bring all the values to t...

IN
Answered by Irida N. Maths tutor
2916 Views

Order the following in terms of boiling point and explain your reasoning: Ethanol, Ethane, Propane

All three molecules have induced dipole-dipole interactions. Propane has a higher boiling point than ethane as propane has a higher molecular mass. This means there are more electrons present and the indu...

LC
Answered by Lucy C. Chemistry tutor
11812 Views

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