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Solve: 4x + 5 = 6x - 13

4x+5=6x-13. Take 4x from both sides 5= 6x-4x-13 5=2x-13. On the right hand side, you have -13 value. Add 13, to make 0. Adding thirteen on right also adds thirteen on left. 5 + 13 = 2x - 13 + 13 18=2x. 2 tim...
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Answered by Yacine H. • Maths tutor
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What is the difference between passive and active immunity?

Active immunity involves your bodies direct response to an unknown pathogen. This response is the production of antibodies specific to the antigen of a particular pathogen. This type of immunity is not immed...
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Answered by Emily P. • Biology tutor
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What is meant by 'activation energy' ?

This is the MINIMUM energy required for a reaction to work or to be activated. If this energy is not reached, the reaction in full does not happy. Imagine a game of basketball. If you do not shoot the ball h...
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Answered by Yacine H. • Chemistry tutor
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Define what 1 mole is

1 mole is just a unit of the amount of particles present in a substance. Here are several definition that all interlink: Mathematically speaking, 1 mole = mass of substance / Molecular Formula Mass. For it t...
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Answered by Yacine H. • Chemistry tutor
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What is the difference between genotype and phenotype?

In genetics, traits such as eye colour, sex and skin colour are carried in genes. Taking eye colour as an example, you will have a gene located somewhere within a chromosome encoding for eye colour. This gen...
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Answered by Andrea D. • Biology tutor
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