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What is the equation of the tangent to the circle x^2 + y^2 = 25 at the point (-3, -4)?

From circle theorems, the tangent to a circle is perpendicular to the radius, and so to find the tangent we can use the gradient of the radius connecting the point (-3, -4) to the centre of the circle and th...
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Answered by Rebecca A. • Maths tutor
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(6^2 + 8^2)^1/2 = (125a^3)^1/3 Work out the value of a?

(6 2 + 8 2 ) 1/2 = (125a 3 ) 1/3 (36+62) 1/2 = (125a 3 ) 1/3 100 1/2 = (125a 3 ) 1/3 +/- 10 = (125a 3 ) 1/3 Using +10 as the left-hand side answer:10 = (125a 3 ) 1/3 1000 = 125a 3 8 = a 3 2 = aUsing -10 as t...
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Answered by Kate S. • Maths tutor
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what are the seven necessary functions of a living organism

There are 7 characteristics shown by all living organisms which can be remembered using the acronym MRS GREN.They are: movement, respiration, sensitivity, growth, reproduction, excretion and nutrition.
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Answered by Ashni S. • Biology tutor
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What is the main gas in bacteria produced biogas?

Methane.
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Answered by Aya A. • Biology tutor
2386 Views

How does Shakespeare present aggressive male behaviour in 'Romeo and Juliet'

Act 1, Scene 1 - Samson and Gregorysentence structure, formComparing Romeo's masculinity to that of the other male characters (Tybalt, Mercutio...)Tybalt, the “fiery”, testosterone-powered, “saucy” man'peace...
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