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Solve the simultaneous equations: x^2 + y^2 = 10 and x + 2y = 5

1.)x² + y² = 10 2.)x + 2y = 5. Rearrange 2nd equation: x = 5 - 2y. Substitute back into 1st equation: (5 - 2y)²+ y² = 10. Multiply out brackets: 4y²

Answered by Edward W. • Maths tutor

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How do I assess the provenance of a primary source?

This answer specifically applies to OCR A-level History, with reference to the Britain 1900-51 as examples, but can also be used in conjunction with AQA and Edexcel.Provenance of a source...

Answered by Melanie P. • History tutor

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Where to put the verb in german?

In normal sentences, within a main clause, the verb always comes second, no matter what comes first. In a subordinate clause, it comes at the end. When the verb form includes an auxiliary verb, the auxili...

Answered by Anke L. • German tutor

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To what extent did the Religious Right influence the United States presidential election of 1980?

The Religious Right massively influenced the United States presidential election of 1980 as they became Reagan, and later, the Republican party's main base. The Religious Right began as opposition to the ...

Answered by Beau R. • History tutor

2736 Views

Why does butane have a higher boiling point than ethane?

GCSE answer: Butane is a larger molecule than ethane meaning that the intermolecular forces between its molecules are stronger. In order for a compound to boil these intermolecular forces need to be overc...

Answered by Lucy B. • Chemistry tutor

23585 Views