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When given an equation with both letters and numbers on each side of the equals sign, for instance 4x +3 = 5x - 3, how do you know what to do first?

With equations like this the most important thing is that you end up with all the numbers on one hand side and all the letters on the other side. People often think there is a 'right' and 'wrong' order to do...
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Answered by Sophie K. • Maths tutor
3422 Views

Solve these simultaneous equations: 2x + y = 7, and 3x - y = 8. Do so by 1) Eliminating an Unknown and 2) Substitution.

The number 'in front of' an unknown is called the Coefficient. When eliminating an unknown, look to see whether the coefficients of x are the same in both equations, or if the coefficients of y are the same....
EH
Answered by Ellie H. • Maths tutor
3822 Views

Why protons held together in the nucleus?

Alike atoms, protons are also made of smaller particles - mesons. When protons are at very close distance mesons are bonded together by the Strong Nuclear Force, which is stronger than the Electric Force, bu...
ED
Answered by Eugeniu D. • Physics tutor
4705 Views

What is the difference between plastic and elastic collision?

An elastic collision is a collision where objects will bounce after they hit each other. For example balls in a pool game bounce after heating each other. For an elastic collision, Mechanical Energy Kinetic ...
ED
Answered by Eugeniu D. • Physics tutor
29982 Views

How do I know when to use le passé simple or l'imparfait ?

In French, both le passé simple and l'imparfait are used for past situations. However, they are not used the same way. Le passé simple is used for short, sudden actions such as : "Out of the blue, she s...
LA
Answered by Lou A. • French tutor
2851 Views