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Explain how the rise in use of fossil fuels and changes in agriculture has influenced global temperatures.

A rise in the use of fossil fuels contributes to increases in global temperatures as they trap more of the sun's radiation in the energy in the Earth's atmosphere. The burning of fossil fuels releases car...

Answered by Sunny C. Geography tutor
1735 Views

Solve the quadratic equation: x^2 - 2x - 15 = 0

To solve this, you need to find two factors of -15 that total to give -2. The solution we're looking for is of the for (x + something) (x + something)=0, as you can then solve each bracket to get two resu...

Answered by James H. Maths tutor
3855 Views

What is the value of tan(45)?

From our base right angled triangle (base and height of 1) and remembering SOH CAH TOA ( tangent = opposite/adjacent), we can deduce tan(45) = 1 / 1 = 1

Answered by Bernardo S. Maths tutor
3662 Views

Simplify 4x^2 + 10x

Find the highest common factor of each component. H.c.f. of 4 and 10 is 2, so:4x2 + 10x = 2(2x2 + 5x)H.c.f of x2 and x is simply x, so:2( 2x2 + 5x) = 2x(2x + 5...

Answered by Bernardo S. Maths tutor
3097 Views

Find the general solution to the differential equation y'' + 4y' + 3y = 6e^(2x) [where y' is dy/dx and y'' is d^2 y/ dx^2]

First find the general solution to the differential equation y'' + 4y' + 3y = 0 as an arbitrary number of the solution to this differential equation can be added to the solution of the differential equati...

Answered by Elliot S. Further Mathematics tutor
4359 Views

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