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A circle C1 has a centre at (3,0) and a radius 8. A second circle C2 has a centre (x,0) and radius 6. Given the radii of the 2 circles meet at right angles. Find x

Gven the radii of the circles meet at right angles then a right angled triangle can be constructed were the hypotenuse is the distance between the centres. Using the Pythagorean triplet, the hypotenuse is 10...
AJ
Answered by Adam J. • Maths tutor
2965 Views

Why does bacteria and sewage cause the death of fish?

This question can be broken down. Sewage contains organic matter which can be broken down, and bacteria need nutrients which they can get from digesting organic matter. Any form of digestion with aerobic bac...
HM
Answered by Hishaam M. • Biology tutor
4152 Views

Consider closely on the writing and effects in your chosen poem by Owen, considering how characteristic it is of the use of imagery in The Collected Poems of Wilfred Owen.

The ‘pity of war’ is what Owen wished to instil in his work and certainly, this is done through the imagery within his war poetry, which is principally an elegy for the victims of World War One – a war which...
SA
5862 Views

In a village the number of houses and the number of flats are in the ratio 7 : 4. The number of flats and the number of bungalows are in the ratio 8 : 5 . There are 50 bungalows in the village. How many houses are there in the village?

H:F F:B7:4 8:550 bungalows, so bungalows have been multiplied by 10 to get from 5 to 50. So now we have to do the same process to the flats so we multiply 8 by 10 to get 80 flats. Now we need to get to 80 fl...
IA
Answered by Isra A. • Maths tutor
8659 Views

Point A lies on the curve: y=x^2+5*x+8. The x-coordinate of A is -4. What is the equation of the normal to the curve at A?

First we will find the gradient of the tangent of the curve at A. So first, we differentiate y with respect to x. We get that dy/dx=2 x+5. We can plug in x=-4 to find the gradient of the tangent at A. We get...
AG
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