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This is a 3 marks exam question from the 2016 summer exam with the Edexcel board. The topic tested here is probability. We are given that the probability of having a female teacher is 3 out of 5. This mea...

In order to solve this formula, you would need to collect similar terms to the same side and then simplify to work out the value of 'x'. We can do this by collecting all the 'x' terms to one side first, t...

3a = 6i + 9j

-b = -4i + 2j

3a-b = (6i-4i) + (9j+2j) = 2i + 11j 

Using the integer rule 1/ (xⁿ) = x^-n question becomes ∫(4x - 2(x^-3)) dx

Then using the formula ∫xⁿ dx = (xⁿ⁺¹)/n+1 and assuming there may be a...

180-140=40 

40/2 =20

each other angle is 20 degrees