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Step 1: Start off by labeling the 2 equations. 3 x + y = 7 will be equation 1. 3 x - y = 5 will be equation 2.

Step 2: rearrange equation 1 to make y the subject. 3 x + y = 7 ---> y = 7 - 3 x (h...

On average neurones in the body have a resting membrane potential (RMP) of -70mv. What this means is when inactive/ not excited, the inside of neurone is more negative than the outside of the neurone this...

A 2x2 square matrix is of the format (a b;c d). First you must check whether the matrix is invertible at all: if ad - bc is 0, the matrix is not invertible. The inverse matrix is (1/(ad-bc))*(d -...

Improving your foreign language speaking abilities can only come through practicing speaking. While of course listening to the foreign language will help, by giving you an idea of typical sentence constru...

When you solve normal equations like 4x-2=7, there is one equation and one unknown value. This case is no different: in order to solve these equations, you need to create one equation with one unknown. We...