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Solve the following simultaneous equations: 2x + y = 17, x - y = 4

2x + y = 17 x-y = 4 ---> x = 4 + y2(4+y) + y = 17 ------> 8 + 2y + y = 17 -----> 8 + 3y = 17 --------> 3y = 9 -----> y=3 x = 4+y ------> x = 7
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Answered by Gavra N. • Maths tutor
6007 Views

Describe and explain the effects of non-optimal pH and temperature on enzyme activity.

Enzymes at the wrong pH experience changes in the charge of the molecule, this can cause impacts on hydrogen and iconic bonds. Enzymes become denatured as terry structure is lost and the active site is no lo...
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Answered by Daisy W. • Biology tutor
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Outline the meaning of term 'parliamentary sovereignty'.

Parliamentary sovereignty is the sum of legal sovereignty and political sovereignty. Legal sovereignty means that the body is the highest body for making law. For instance, in the UK, Parliament can pass law...
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Answered by Hannah C. • Law tutor
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How are the lungs adapted to increase the rate of diffusion? 3 Marks

Increase in surface area, which is provided by the many alveoli that are located at the end of the bronchioles. These can number in the thousands. The alveoli have a thin wall, one cell thick, so diffusion c...
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Answered by Louise C. • Biology tutor
6036 Views

How is the idea of the spinning wheel communicated in Schubert's 'Gretchen am Spinnrade'?

Firstly, Schubert emulates the spinning wheel through his use of incessant semiquaver motion in the right hand of the piano accompaniment. The pattern opens the piece and recurs throughout, with the initial ...
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Answered by Rachel H. • Music tutor
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