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Describe 2 ways in which the body prevents entry of microorganisms into the body

-acid in the stomach kills any pathogens-skin acts as a physical barrier to pathogens-hair in the nose and ears trap any pathogens -saliva & mucous trap pathogens. The bronchi have villi that help move p...
SH
Answered by Sara H. • Biology tutor
4372 Views

(Core 2) Show that the region bounded by the curve y = 7x+ 6 - (1/x^2), the x axis and the lines x = 1 and x = 2 equals 16

The question wants us to confirm the answer so the marks will be in the method unlike most questions which require you to find the answer. How to approach this is by thinking what ways can we calculate areas...
LJ
Answered by Lewis J. • Maths tutor
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How to find the equation of a line from a graph?

Location of t wo points that lie on the line is needed to define an equation of the line. The general equation of a line is in the form y = mx + c , where m is the gradient of the line and c is the y coordin...
TK
Answered by Tomas K. • Maths tutor
3506 Views

A curve (C) with equation y=3x^(0.5)-x^(1.5) cuts the X axis at point A and the origin, calculate the co-ordinates of point A.

Insert 0 into the equation in place of Y as the Y co-ordinate is always 0 across the X-Axis.0 = 3x^0.5-x^1.5The x^0.5 can be factored out from the 3x^0.5 and the x^1.5 giving you...x^0.5(3-x^1) = 0 [As x^0.5...
JM
Answered by Jack M. • Maths tutor
3854 Views

If side A is 3m and side B is 4m, what would be the length of the remaining side C?

If side A is 3m and side B is 4m, what would be the length of the remaining side C? A = 3m ; B = 4m ; C =?Use Pythagoras Theorem to give the equation: A 2 + B 2 = C 2 Rearrange:(A 2 + B 2 ) 1/2 = C Because I...
HC
Answered by Harry C. • Maths tutor
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