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Solve the simultaneous equations 2x + y = 18 and x - y = 6

2x + y = 6x - y = 6x = 6 + y => 2(6 + y) + y = 18 => 12 + 3y = 18 => 3y = 6 => y = 2x - (2) = 6 => x = 8x = 8, y = 2
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Answered by Harry H. • Maths tutor
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How should I answer an essay question?

Firstly you should take some time to read the question fully at least 3 times and to circle/underline/highlight what it is asking you to do in order to ensure you fully understand it. Secondly you should pla...
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Answered by Zoe C. • English tutor
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Why does first ionisation energy decrease as you go down a Group in the Periodic Table?

There are two reasons: increasing atomic size and increasing shielding effect. Increasing atomic size - As you go down the Group, the atom size becomes larger, therefore the electron that must be removed is ...
Answered by • Chemistry tutor
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¿Cómo ha cambiado la actitud del sistema legal en España hacia la homosexualidad en los últimos 60 años?

Cuando Franco ganó la Guerra Civil Española, el país quedó en una posición de retroceso frente a los procesos de modernización de los distintos paises Europeos. Occidente abrió su mente en temas sociocultura...
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Answered by Anna d. • Spanish tutor
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FInd the equation of the line tangent to the graph g(x)=integral form 1 to x of cos(x*pi/3)/t at the point x=1

This problem requires us to find out the equation of the tangent line, which has form y=mx+q.M is the angular coefficient or slope of the line and can be evaluated through the derivative of the function at t...
Answered by • Maths tutor
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