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The equation of line L1 is y = 3x-2 and the equation of line L2 is 3y-9x+5 = 0. Show that these two lines are parallel.

For two lines to be proven as parallel they must have the same gradient. The second equation needs to therefore be rearranged into y = mx + c format to see if this is the case.3y-9x+5 = 0 (subtract the 5)3y ...
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Answered by Frankie H. • Maths tutor
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Solve the simultaneous equations, (1) 4x+y=23 and (2) 3x+5y=111/2

Simultaneous equations are equations that have one or more unknown values. There are a multitude of ways to solve simultaneous equations, however the elimination method is the most common at GCSE level maths...
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Answered by Allegra P. • Maths tutor
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What is oxidation and reduction?

Reactions can be explained in terms of loss and gain of electrons. Oxidation is Loss of electrons and Reduction is gain of electrons. When electrons are lost oxidation number increases, whereas reduction lea...
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Answered by Charles H. • Chemistry tutor
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What is the process of diffusion?

Diffusion is the movement of a substance from an area of high concentration to an area of low.For example, imagine spraying a deodorant can. The substance coming out of the can is at high concentration and o...
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Answered by Charles H. • Biology tutor
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How is the small intestine adapted for efficient absorption?

Diffusion is the main mechanism for absorption within the small intestine, so effective diffusion is the key to sufficient nutrient absorption. The small intestine has a very large surface area, created by f...
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Answered by Michelle L. • Biology tutor
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