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Find values for x and y from two simultaneous equations: 2x + y = 5 and 3x + y = 7

Rearrange one of the equations to make y the subject:y = 5 - 2x Substitute y into the other equation: 3x + 5 - 2x = 7 x = 2 y = 5 - (2 x 2) y = 1
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Answered by Marco V. • Maths tutor
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How do you form the preterite tense in Spanish?

For a regular Spanish '-ar' verb, for example 'hablar' - to speak, we remove the -ar ending and replace it with the endings as follows:I - éyou - astehe/she - ówe - amosyou (pl.) - asteisthey - aronThe struc...
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Answered by Alexander B. • Spanish tutor
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Describe the function of one hormone in human behaviour

The hormone oxytocin is produced by the hypothalamus and released into the bloodstream through the pituitary gland and into the brain where it attaches to oxytocin receptors. Oxytocin has been associated wit...
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Answered by Alexia O. • Psychology tutor
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AQA 2017 Topic 2 question b (actual): Two reasons why parliament shouldn't be considered 'irrelavant and all but powerless in the legislative process'.

As this question is worth 10 marks, I would advise briefly introducing your answer with a quick quote that outlines your position followed by stating the two points your are to back up your answer with. For ...
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Answered by Oliver S. • Politics tutor
2376 Views

Briefly describe the processes of ultrafiltration and selective reabsorption in the nephron

Ultrafiltration, the first stage of urine formation, begins when blood enters the glomerulus via the afferent arteriole. Water, glucose, ions and amino acids leave the blood and enter the bowman’s capsule. T...
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