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In the expansion of (x-7)(3x**2+kx-3) the coefficient of x**2 is 0. i) Find the value of k ii) Find the coefficient of x. iii) write the fully expanded equation in terms of x

i) multiply out: 3x3+kx2-3x-21x2-7kx+21 simplify: 3x3+(k-21)x2+(-7k-3)x+21 the coefficient of x2 is 0 and therefore k-21=0 k=21.
ii)from i) the c...

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How do vaccinations work? Relating to humoral immunity and the secondary immune response.

The body has both humoral and cell mediated immunity. A vaccination involves injecting a patient with inert (Inactivated) or dead material from a pathogen, be that a bacterium or a virus. Once injected in...

SJ
Answered by Sophie J. Biology tutor
2695 Views

For the equation 7x+3y=10x/y make x the subject.

7xy+3y2=10x 3y2=10-7xy 3y2=x(10-7y) 3y2/10-7y=x

TH
Answered by Tom H. Maths tutor
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How do I begin my personal statement?

In your opening section, you should begin by describing your core motivation for desiring to enter into your chosen course of study, this will give the admissions officer an immediate sense of your passio...

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Describe two ethical issues related to Milgram's study of obedience

  1. Deception was used in order to carry out the experiment. Participants were unaware of the confederates in the experiment and that they would always be assigned as a teacher and the confederate would...
DM
Answered by Dristi M. Psychology tutor
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