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The line L has equation y=5-2x. Find an equation of the line perpendicular to L, which passes through the point P (3,-1).

The gradient of the line L is -2 so the gradient of the line perpendicular to L will be the negative reciprocal of -2 which is 1/2.The equation of the line perpendicular to L will be y=mx+c where m is the gr...
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Answered by Katie N. • Maths tutor
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Choisissez la bonne conjugasion da la phrase suivante;

Bien qu'elle soit certaine de les avoir faits, le professeur ne croit pas que Sophie; a fait ses devoirs fait ses devoirs ait fait ses devoirs
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Answered by Glen O. • French tutor
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List some of the concerns around in utero genetic testing

There is a risk to the health of the fetus There is a risk to the health of the mother There is a risk that this could lead to an abortion/miscarriage There is a risk that it could lead to "designer bab...
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Answered by Jack C. • Biology tutor
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Explain how the different dyes in ink are separated by chromatography

As the water (the solvent) moves up the paper it carries the ink with it, but the dyes in the ink are differently soluble in the solvent AND the dyes are differently attracted to the paper, therefore the dye...
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Answered by Jack C. • Chemistry tutor
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Suggest why some animals (such as snakes) can go for longer periods of time without eating, than humans?

Firstly it is important to understand that food is metabolised and that produces the energy needed for bodily fuctionsThere could be a number of reasons for animals going a longer time without eating:1 - the...
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Answered by Jack C. • Biology tutor
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