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If f(x)=x^2 and g(x)=5x-11, then what is fgg(x) when x=3?

g(3)=5(3)-11=15-11= 4 gg(3)=g( 4 )=5(4)-11= 20-11= 9 fgg(3)=f( 9 )=9 2 =81 fgg(3)=81
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Answered by Simon M. • Maths tutor
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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 equat...
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Answered by Samantha W. • Maths tutor
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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.
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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 aro...
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Answered by Jonathan S. • Physics tutor
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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 muta...
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Answered by Jonathan S. • Biology tutor
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