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Find the roots of the quadratic equation 2x^2 - 15x - 8

First we have to multiply 8 and 2 together to get 16. We then need to find all the factors for this number.These are:1 and 162 and 84 and 4 From these sets of factors, we have to find which has a difference ...
SG
Answered by Siobhan G. • Maths tutor
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How does anti-diuretic hormone work to control water loss?

What is it?Anti-diuretic hormone (ADH) is a hormone produced by the hypothalamus and released by the posterior pituitary gland (in the brain), that acts on the nephron in the kidney, specifically the distal ...
ET
Answered by Ellie T. • Biology tutor
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Find the coordinates of the turning point of the equation y =x^2-8x+10

We know that the turning point of this quadratic will be a minimum point because the coefficient of x2 is positive (1). To find the turning point, we must complete the square: y= (x-4) 2 -16 +10 so y= (x-4) ...
SR
Answered by Sita R. • Maths tutor
7241 Views

What is the main differences between a Parliamentry and Presidential systems?

Parliamentry and Presidential systems are two of the most common governmental systems used. The two oldest and most prominent examples of these systems are the British and American systems respectively. The ...
GK
Answered by Gareth K. • Politics tutor
2258 Views

The acid dissociation constant, Ka, of ethanoic acid is 1.78 x 10^-5 at 298K. Given that the concentration of a sample of ethanoic acid is 0.4moldm^-3, calculate its pH at 298K.

Using the acid dissociation equation, Ka = [H+][A-]/[HA]. (where Substitute the known values into the concentration to give 1.78x10 -5 = [H+][A-]/0.4 . Because the acid is dissociating in solution the acid d...
SR
Answered by Sita R. • Chemistry tutor
14792 Views