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What is photosynthesis and where does in occur?

"Photo" means light and "synthesis" means to make something. Photosynthesis is the production of oxygen and glucose from sunlight, carbon dioxide and water in green plants. The glucose cr...
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Answered by Bella B. • Biology tutor
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Solve the simultaneous equations for x and y: 9x-2y=7 4x-2y=2

Using the elimination technique:As we have -2y in both equations we can take the equations away from each other in order to eliminate -2y and create a new linear equation involving only x. this equation woul...
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Answered by Mira P. • Maths tutor
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I looked at AQA higher tier roleplay 15 June 2018

General tips before we begin ! means you have to respond to something you haven't seen before and ? means you need to ask a questiontú? Is allowed for questionSelf correction, ask puedes repetirlo, ask a que...
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Answered by Clare B. • Spanish tutor
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Why can crude oil be separated by fractional distillation?

Crude oil is composed from hydrocarbons of varying chain length. Hydrocarbons with longer chains have higher boiling points due to the increasing strength of intermolecular forces with length, therefore the ...
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3 teas and 2 coffees have a total cost of £7.80; 5 teas and 4 coffees have a total cost of £14.20. Work out the individual cost of one tea and one coffee.

The question can be written algebraically, as:(a) 3t + 2c = 7.80(b) 5t + 4c = 14.20To work out the individual costs, we need to make one of the sets of variables equal. We can do this by multiplying the equa...
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Answered by Charlotte F. • Maths tutor
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