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Solve the simultaneous equations. (1) 2x + y = 18 (2)x − y = 6

In these simultaneous equations, there are two unknowns. The first is x, the second is y. The aim of a question like this is to find what x and y are equal too. A method to doing this is to rewrite one eq...

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Answered by Samantha W. Maths tutor
4809 Views

Describe the perfect ionic model

In this model ions are considered perfect spheres and therfore point charges. In this model ions have only electrostatic attraction with no covalent interactions.

JS
6149 Views

Define a geostationary orbit

A geostationary orbit is one that appears in the same location as seen from an observer on earth. This requires three criteria; It's orbital period must be 24 hours The orbit must be above the equator at...

JS
Answered by Jonathan S. Physics tutor
2719 Views

Not all mutations lead to changed in amino acid sequence of polypeptides. Explain why.

Amino acids are the building bricks of life. Redundency occured with in their coding however. A single Amino acid may be coded for by more than one codon (a sequence of three nucleic acids) and therfore m...

JS
Answered by Jonathan S. Biology tutor
2552 Views

If a rectangle has length (x-4), width (x-5) and area 12 then what is the value of x?

length x width = area (as rectangle)(x-4)(x-5)=12x2-9x+20=12x2

SM
Answered by Simon M. Maths tutor
3538 Views

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