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Solve the simultaneous equations, make sure to show clear algebraic working: 3x + 5y = 14, 4x + 3y = 4

3x + 5y = 14 (times this entire equation by 3) --> 9x + 15y = 42 4x + 3y = 4 (times this entire equation by 5) --> 20x + 15y = 20Now both of the simultaneous equations have 15y, so you can subtract the...
AT
Answered by Alexander T. • Maths tutor
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What is cracking of hydrocarbon molecules?

Cracking is when large hydrocarbon molecules are broken down into smaller ones using a catalyst - one alkane and one alkene are formed.Alkanes are hydrocarbons with only single bonds.Alkenes have one double ...
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Answered by Valeria W. • Chemistry tutor
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done

done
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Answered by Mohammed A. • Biology tutor
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Using a case study discuss the problems of rapid rural to urban migration?

India is an example of an NEE, a newly emerging economy, this is due to the rapid rural to urban migration that has been taking place. One of the biggest problems with people moving from rural areas to urban...
MT
Answered by Millie T. • Geography tutor
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Express cos(2x) in the form acos^2(x) + b, where a and b are constants.

we first remember the double angle formula, a really important formula. cos(2x) = cos 2 (x) - sin 2 (x).We know that sin 2 (x) + cos 2 (x) = 1, therefore, cos(2x) = cos 2 (x) + cos 2 (x) - 1. Giving our fina...
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Answered by Jack P. • Maths tutor
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