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Solve the simultaneous equations x – 2y = 1 and x^2 + y^2 = 29.

Start by modifying the first equation and making a third x=2y+1x2 = (2y+1)2 x2=4y2+4y+1therefore, if we sub this 3rd equation into the 2nd equation we get :4y

AP
Answered by Adamya P. Maths tutor
6520 Views

Explain how blood glucose levels are controlled and how this is an example of negative feedback mechanisms.

The pancreas detects rises in blood glucose levelsThis triggers pancreatic beta cells to secrete insulin, and inhibits alpha cells from secreting glucagonInsulin stimulates the uptake of glucose into cell...

HL
Answered by Hannah L. Biology tutor
2776 Views

Name three modifiable and three non-modifiable risk factors of coronary artery disease.

Modifiable; SmokingObesity High cholesterol
Non-modifiable; AgeGenderRace

HL
Answered by Hannah L. Biology tutor
2869 Views

Identify the word class and archaic spelling patterns of the following words using appropriate terminology: A) 'Passe' B) 'Seruice' [4 marks]

This question highlights the importance of basic terminology and is specifically asking to identify the word class and archaic spelling pattern of each word. In order to decipher the two components the qu...

AW
4207 Views

In a box, there is 1 more green pens than black pens. The probability of taking 2 black pens is 0.2 . How many pens are in the box?

g = b+8g+b = p = 2b+1(b/p) x (b-1)/(p-1) = 1/5(b^2 - b)/(p^2 - p) = 1/5sub in p= 2b+1(b^2 - b)/(4b^2 + 2b) = 1/55b^2 - 5b = 4b^2 + 2bb^2 -7b = 0b = 7 or b = 0 (cannot be 0 as 2 pens must be taken)p = 2(7)...

JL
Answered by James L. Maths tutor
2913 Views

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