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What is the centre and radius of the circle x^2+y^2-6x+4y=-4

First make left =0x 2 +y 2 -6x+4y+4=0Second put same terms together(x 2 -6x)+(y 2 +4y)+4=0Complete the Square (do a square (X+b) 2 that gives you you x 2 and x terms, repeat with y) these give you the centre...
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Answered by Flik C. • Maths tutor
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Solve( 3x−2)/4 −(2x+5)/3= (1−x )/6

Firstly, take a common denominator for the left hand-side of the equation which would be 12 and then carrying out the subtraction. After carrying out the subtraction you will be left with two fractions - one...
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Answered by Wahid R. • Maths tutor
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What is meant by the term mutation?

It is a random and spontaneous change to DNA that can be inherited. Most mutations have no effect on the phenotype, however some have a small effect and rarely do some have a significant effect.
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Answered by Sebastian S. • Biology tutor
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Given X + 3Y = 19 and 2X - Y = 10, find X and Y

This is a simple simultaneous equationFirst we multiply the second equation by 3 to get 6X - 3Y = 30Then we add the first and second equation together to get 6X + X +3Y - 3Y = 30 + 19which we simply to 7X = ...
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Answered by Guillermo V. • Maths tutor
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Describe Round Robin Scheduling

Round robin scheduling is a process by which a computer can multitask. Technically a computer cannot multitask but what round robin does is it gives each task/program a very small time slice of the processor...
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