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Derive the following: f(x)=(96/x^2)+kx

f'(x)=(-192/x^3)+k

Answered by Adrien D. • Maths tutor

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Conjugate the following to present tense: "Que (faire)-tu ce soir? Moi je (rester) à la maison. Je (être) trop fatigué pour sortir."

"Que fais-tu ce soir? Moi je reste à la maison. Je suis trop fatigué pour sortir."

Answered by Adrien D. • French tutor

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A family go into a shop, they buy three sandwiches and two packets of crisps. It costs them £9. Another family buy five sandwiches and six packets of crisps. It costs them £19. How much does two sandwiches and five packets of crisps cost?

We will call sandwiches S and packets of crisps C. These are the 'unknowns'. From the information we can write down two equations. Equation 1: 3S + 2C = 9 and Equation 2: 5S + 6C = 19. We need two equatio...

Answered by Nicholas W. • Maths tutor

3003 Views

Describe the process of natural selection

A mutation occurs in the genotype of an organism. This results in a beneficial phenotype being expressed. This organism now has a survival advantage. Therefore, it will live longer. This means it will hav...

Answered by Katherine O. • Biology tutor

2362 Views

Describe the process of DNA replication

DNA replication is semi-conservative, meaning existing strands are used as templates for new strands. The DNA is separated (unwinds) by the enzyme helicase. This enzyme breaks the H bonds between nucleoti...

Answered by Katherine O. • Biology tutor

2525 Views