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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+1x 2 = (2y+1) 2 x 2 =4y 2 +4y+1therefore, if we sub this 3rd equation into the 2nd equation we get :4y 2 +4y+1+y 2 =29 5y 2 +4y-28=0 5y 2 -10y+4y...
AP
Answered by Adamya P. • Maths tutor
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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 cells a...
HL
Answered by Hannah L. • Biology tutor
3698 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
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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 quest...
AW
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Explain the process of using de Moivre's Theorem to find a trigonometric identity. For example, express tan(3x) in terms of sin(x) and cos(x).

Identify de Moivre's Theorem: (cos(x) + isin(x)) n = cos(nx) + isin(nx) 2) Deduce the correct value of n for the given problem. In this example we set n=3 3) Expand the LHS (usually by a binomial expansion)....
OL
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