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Expand the following: (4x+7)(7x-2)

Using the FOIL (Firsts, Outsides, Insides, Lasts) mnemonic, you can expand these two brackets. F: 4x x 7x = 28x^2 O: 4x x -2 = -8x I: 7 x 7x = 49x L: 7 x -2 = -14 Therefore the expansion as a whole is: 28x^2...
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Answered by Gem P. • Maths tutor
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Explore Revenge in Shakespeare's Hamlet

An ideal answer would include a clear thread of argument, showing a thoughtful response to the play. Each point made should be backed up with relevant quotations from the text and build upon the argument. Fo...
RS
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Tobacco mosaic virus (TMV) can cause plants to produce less chlorophyll. This causes leaf discoloration. Explain why plants with TMV have stunted growth.

The reduction in plant chlorophyll content due to TMV means that less photosynthesis is reduced. Chlorophyll is integral to photosynthesis. A reduction in photosynthesis means that there is a subsequent redu...
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Answered by Shloke J. • Biology tutor
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Guide for translation

To begin with translation and understanding of a text is formed by many different components, therefore it's translation is a methodical process. First of all one has to be aware of basic grammar rules, e.g....
IL
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Calculate the mass of 7.23 moles of CH​​​​​​​4

Molar mass of CH 4 = 12 + 4(1) = 16 mass = Mr x moles mass = 16 x 7.23 mass = 115.68g = 116g (3sf)
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Answered by Misha P. • Chemistry tutor
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