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You are told that the y is proportional to x^2 and that when y=75, x=5. Find a formula for x in terms of y.

If we know that y is proportional to x 2 then we using the given values we can write 75= 5 2 --> 75=25, however this is obviously not true but all that remains is to multiply the 5 2 by 3 which gives us 7...
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Answered by Jenieka P. • Maths tutor
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Explain the processes that lead to the contraction of a single muscle

A nervous impulse travels to the neuromuscular junction and causes the release of acetylcholine into the synaptic cleft. Depolarisation of the motor end plate spreads through the muscle via transverse tubule...
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Answered by Prashan B. • Biology tutor
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1. (a) Express 7cosx - 24sin x in the form R cos (x + a), (b) hence what is the minimum value of this equation

(a) Rcos (x+a) = Rcosxcosa - Rsinxsina 7cosx - 24sinx = Rcosxcosa - Rsinxsina Rcosa = 7, Rsina = 24 Tan a = 24/7 a = 1.287 (3 S.F.) R 2 = 24 2 + 7 2 R = 25 Therefore 25cos(x + 1.287) (b) minimum value = -1 *...
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Answered by Prashan B. • Maths tutor
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Analyse Gatsby’s attitude to Daisy in aiming to achieve his own version of the American Dream. Refer to the extract as a starting point.

Example paragraph: The extract initially describes Baldwin’s departure from a building, and the particular language choices aid us in relating the text to Gatsby’s intense business lifestyle and how this aff...
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Answered by Charlotte F. • English tutor
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Literature often reflects destruction with little room for redemption. Compare and contrast two of the texts you have studied in light of this comment.

Ian McEwan and Tennessee Williams weave the theme destruction into the novels ‘Atonement’ and ‘A Streetcar Named Desire’ by portraying the influence of class and wealth and the injustice it causes. The ident...
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