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Explain why the noble gases are inert.

Atoms in group 8 have a full outer electron shell. This means they don't have a tendency to lose, gain or share electrons with other elements to achieve a full outer shell. This explains why they don't form ...
CP
3841 Views

Find the turning point of the graph y = x2^ + 3x − 10

the turning point of curve is when the gradient of the curve is 0. to find the gradient of the curve, we need to differentiate the curve.y = x 2 + 3x - 10dy/dx = 2x + 3gradient = 2x + 3 = 02x = -3x = -1.5now...
EG
Answered by Estella G. • Maths tutor
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How do you solve a quadratic equation? eg: x^2 + 2x - 8

Well, when solving quadratic equations we have two options, either A: factorize the equation and solve or B: Use the '-b' formula. Option A is usually a lot quicker but does require you to practice factorizi...
AK
Answered by Ahad K. • Maths tutor
3266 Views

Compare and contrast the presentation of guilt in Shakespeare’s ‘Hamlet’, Hosseini’s ‘The Kite Runner’ and William’s ‘The Glass Menagerie’. To what extent is guilt presented as inescapable?

The theme of guilt is central to all three texts; Hamlet is fuelled by the protagonist's guilt at being unable to act and the weight of his knowledge, The Kite Runner follows Amir's search for redemption and...
AT
Answered by Amy T. • English tutor
2339 Views

5^a = 1/25, 5^b = 25sqrt(5), 5^c = 1/sqrt(5). What is the value of a + b + c?

Two ways to do it. Manually work them all out: 5 a = 1/25 means a = -2, 5 b =25sqrt(5) means b = 2.5, 5 c = 1/sqrt(5) means c = -0.5. So a + b + c = -2 + 2.5 + 0.5 = 0. Can alternatively remember that (x t )...
CH
Answered by Connor H. • Maths tutor
3448 Views