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Explain Darwin's theory of evolution in 3 marks?

There is a variation of phenotypes in the general population 2) Some characteristics confer an advantage in the environment 3) The organisms with advantageous characteristics survive to breed and pass on the...
LS
Answered by Lily S. • Biology tutor
2887 Views

5x+3 = 18. What is the value of x?

Take away 3 from both sides to give you : 5x = 15Divide by 5 on both sides to give you : x = 3
JB
Answered by Joseph B. • Maths tutor
3598 Views

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 carbon...
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Answered by Sunny C. • Geography tutor
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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 results...
JH
Answered by James H. • Maths tutor
5565 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
BS
Answered by Bernardo S. • Maths tutor
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