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How does an adult develop immunity to a toxin (3 marks)

They must first become exposed to the bacteria or pathogen that produces the toxin. This will either be though encountering it naturally or through a vaccination. Once the pathogen has entered their body the...
LH
Answered by Lexie H. • Biology tutor
5086 Views

Factorise y^2 - y - 12

Looking for a combination of numbers that would multiply to give (-12_ but add together to give (-1)e.g. -6, 2?....-2,6....-4,3 = yes!thus,(y-4)(y+3)
LM
Answered by Lavannya M. • Maths tutor
4413 Views

5x-7 = 3x + 3, solve x

This is how the answer would be written in an exam!5x - 7 = 3x + 35x-3x = 3 + 72x = 10 x = 10/2x = 5
LM
Answered by Lavannya M. • Maths tutor
5007 Views

Lily goes on a car journey. For the first 30 min. her average speed is 40 mph. She then stops for 15 min. She then completes the journey at an average speed of 60 mph. The total journey time is 1 h. What is her overall average speed?

average speed=total distance/time taken ; distance=speed x timeFor the first part of her motion the distance she travelled, d 1 =40 x 1/2 (as 30 minutes represent half an hour), so d 1 =20 milesFor the secon...
SJ
8928 Views

Silas Marner: Write about Eppie and how she is presented in the novel.

Throughout the novel, George Eliot presents Eppie as innocent, angelic and perfect. Description of her as 'golden' reflects how precious she is due to the value of gold both now and in the nineteenth century...
EB
7590 Views