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Solve the simultaneous equations 3x + 2y = 12 and 10y = 7x + 16

First we need to rearrange both equations into the form ax + by = c (where a, b and c are the integers). We can label these 1. and 2.We then have:3x + 2y = 12 1.7x -10y = -16 2.In order to find the x value, ...
AA
Answered by Anjali A. • Maths tutor
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How do I do redox calculations?

For example,Iron(II) sulphate can be oxidised using acidified potassium permanganate solution. Calculate the mass of iron(II) sulphate which will completely react with 200 cm3 of 0.25 mol l-1 acidified perma...
CG
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Stalin’s failure to abide by the agreements made at Yalta and Potsdam caused the Cold War? (IGCSE 2016)

Tackling a question - especially in a high-pressured exam environment - it can be very helpful if you start with a structure and plan; and then use this to arrange your knowledge of a topic as it 'pops into ...
JA
Answered by John A. • History tutor
7820 Views

Define the term PPF and illustrate it.

A PPF (Production Possibility Frontier) is a curve showing the maximum combinations of two goods and services produced over a period of time, with all available resources used at maximum efficiency. (Diagram...
LG
Answered by Lochan G. • Economics tutor
2465 Views

A typical question is about energy transfer - Explain the process of convection and give an example of where we can find them

Molecules in the air encounter an energy source, they gain energy and begin to heat up which causes them to vibrate faster and become less dense which causes them to rise. As they rise, they begin to lose en...
MM
Answered by Max M. • Physics tutor
2998 Views