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A linear sequence is as follows: a+b, a+3b, a+5b .... The 2nd term is equal to 15. The 6th term is 47. What is the value of a? What is the value of b? Show your working.

a+3b = 15, a+11b=47 , use simultaneous equations to get 8b = 32 therefore b=4 and a=3.
LR
Answered by Liam R. • Maths tutor
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Explain how vaccinations prevent disease.

Vaccinations introduce the human immune system to pathogenic antibodies in a safe way. This could be in the form of the dead pathogen, a genetically engineered version or the lone antibody. The antibody acti...
GK
Answered by Georgina K. • Biology tutor
4738 Views

Given that y = cosh^-1 (x) , Show that y = ln(x+ sqrt(x^2-1))

Have a picture of full working with annotation to go through during interview.Here is rough outline:y = cosh -1 (x)x = cosh(y)x = (e y +e -y )/22x = e y +e -y e y +e -y -2x = 0Turn into hidden quadratic by m...
MW
6126 Views

Compare the presentation of female experience in your 2 chosen texts?

In both Mrs Dalloway and Wuthering Heights – Woolf and Bronte respectively use different avenues to present the experience of females most notably through the characters of Clarissa and Catherine respectivel...
FA
Answered by Fisayo A. • English tutor
4750 Views

outline one biological explanation for schizophrenia (4 marks)

One biological explanation for Schizophrenia is the Dopamine hypothesis. This proposes the idea that here is an excess amount of D2 receptors that causes the brain to release more dopamine as it believes mor...
MK
7555 Views