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Solve algebraically the simultaneous equations x^2 +y^2 = 25, y – 3x = 13

Rearrange y - 3x = 13y = 3x + 13 2. Substitute into x^2 +y^2 = 25x^2 + (3x + 13)^2 = 25 3. Expand bracketx^2 +(9x^2 + 39x +39x +169) = 25 4. Form quadratic equation 10x^2 + 78x + 144 = 0 (Dividing by 2 makes...
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Answered by Emily N. • Maths tutor
5173 Views

How can I tell the difference between a Petrarchan sonnet and an English/Shakespearean sonnet?

Petrarchan and English sonnets are very similar forms but have a few easy to spot characteristics that let you differentiate between them. The Petrarchan sonnet is the earliest sonnet form and consists of an...
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Answered by Alexander W. • English tutor
5960 Views

How do I know when to use "être" or "avoir" to conjugate in the perfect tense?

In English, the perfect tense always requires the auxiliary verb "to have", but in French, you will need to use either avoir (= "to have") or "être" (= to be). Most verbs will r...
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Answered by Marie P. • French tutor
2735 Views

How can studying music give us an insight into social change throughout history?

Throughout history, the kind of music people compose, perform and listen to is intrinsically linked to the kinds of lives these people lived. The sheer fact that not much of popular/folk music pre-1850 has b...
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Answered by Tutor73636 D. • Music tutor
3579 Views

What is the difference between HTML and CSS?

HTML (Hypertext markup Language) can be thought of as the blueprint for a website. It defines the structure and content of the page in a way that can be easily understood by the browser that receives it.CSS ...
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Answered by Luke B. • HTML and CSS tutor
2375 Views