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Solve this simultaneous equation: 3x + y = 10, x + y = 4

x = 3
HM
Answered by Hibah M. • Maths tutor
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Solve this simultaneous equation for x: 3x + y = 10, x + y = 4

x = 3
HM
Answered by Hibah M. • Maths tutor
4162 Views

Why is the boiling point of water significantly greater than that of other group 6 (16) hydrides?

Water exhibits hydrogen bonding between neighbouring molecules, where other group 6 hydrides are held together by much weaker (ca. 10 x) Van Der Waal's forces of attraction. Waters hydrogen bondong ability a...
JS
Answered by Joe S. • Chemistry tutor
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Rationalise the denominator of 1/(4 + sqrt(3))

This denominator is irrational because it contains a surd. To rationalise the denominator we multiply the numerator and denominator by the conjugate of the denominator. In this case, the conjugate of the den...
GM
Answered by Giles M. • Maths tutor
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A linear sequence starts a + 2b, a + 6b ,a + 10b ,…….. ,…….. The 2nd term has value 8. The 5th term has value 44. Work out the values of a and b

To start with, we need to notice the difference between each of the terms in the sequence. As this is a linear sequence, the sequence increases or decreases by the same amount between each term. In this ques...
CI
Answered by Charlotte I. • Maths tutor
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