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R and B are directly proportional variables. When R = 9, B = 3. What does R equal when B = 14?

R and B are directly proportional variables. Therefore, we can write a relationship between them as R = kB where k is a proportionality constant. We can rearrange this equation to calculate the value of k...

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Answered by Liban W. Maths tutor
3425 Views

Simplify: ((3x^2)-x-2)/(x-1).

Firstly, simplify the numerator by factorising the quadratic, to give a numerator of (3x+2)(x-1). Now, divide through by (x-1), to give (3x+2).

OK
Answered by Oscar K. Maths tutor
3856 Views

What is the name of the compound with the formula CH3CH2CH(OH)CH3, and what is the name of its functional group?

The compound's name is butan-2-ol: four carbons in the chain means the compound has the but- prefix; the alcohol group is on the second carbon, so the compound has the -2- suffix; and the functional group...

OK
Answered by Oscar K. Chemistry tutor
28269 Views

Explain the chain rule of differentiation

The chain rule can be used to find more complex derivatives.For example, in the case of: y = (5x + 2)5To find the derivative in the ordinary fashion, one would need to expand the brackets to:y=...

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Answered by Toby H. Maths tutor
3894 Views

'Describe how journalists may approach the issue of pupil behaviour in British schools differently from sociologists' [4 marks]

To answer this question, we identify the action (to describe), the focus (journalist versus sociologist approach on pupil behaviour) and the argument (

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Answered by Eva S. Sociology tutor
1991 Views

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