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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
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Introduction to a basic conversation in Spanish

Basic reading practise is a great way to introduce new students to learning Spanish. Not only does it develop the ability to pronounce various sounds, but it also develops confidence (essential to language l...
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Answered by Rhiannon E. • Spanish tutor
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Solve the following simultaneous equation: 3x+y= 11 and 2x+y=8.

X= 3y= 2
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Answered by Lara D. • Maths tutor
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Why do cells divide? Why not simply get bigger?

- Larger cell have smaller SA:Vol Ratio- Difficulty in exchange materials- Multicellular more efficient- Revisit – transfusion, osmosis, active transport
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Answered by William W. • Biology tutor
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What are the causes of desertification?

What are the causes of desertification?(Note - We are solely looking at the causes and not the effects or solutions of desertification)So break the question down: Define desertification - degradation of land...
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Answered by Grace K. • Geography tutor
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