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How do you solve simultaneous equations?

There are two main methods:Substitution and elimination which can be demonstrated on the white board.
AC
Answered by Adham C. • Maths tutor
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Explain the main structures of a human cell.

A human cell is made up of:Cell Membrane: provides structure for the cell and controls what goes in and outCytoplasm: Jelly like liquid which contains the organellesNucleus: Contains DNAMitochondria: Make AT...
AC
Answered by Adham C. • Biology tutor
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Explain why the body tenses up in rigor mortis

This is because when an organism dies there is no source of ATP, without this source of ATP ant myosin heads attached to the actin binding site cannot detach therefore leaving the muscles in a contracted sta...
Answered by • Biology tutor
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How does natural selection occur?

A population of organisms exists with a set range of alleles. In an organism, a random mutation can result in the formation of a new allele. Some mutated alleles can be beneficial to an organism, and increas...
TP
Answered by Thendrral P. • Biology tutor
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Show that 2sin(x) =(4cos(x)-1)/tan(x) can be written as: 6cos^2(x)-cos(x)-2=0

Rearranging gives:4cos(x)-1 = 2sin(x) tan(x) Substituting in tan(x)=sin(x)/cos(x) gives:4cos(x)-1 = 2sin(x) (sin(x)/cos(x))2sin 2 (x)=4cos 2 (x)-4cos(x)Substituting in 2sin 2 (x) = 2-2cos 2 (x) (from the tri...
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Answered by Olivia T. • Maths tutor
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