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Tom's dad is 3 times older than him. In 15 years the sum of Tom's and his dad's ages will be equal to 102. How old are Tom and his dad now?

Assume that Tom's age now is x and that his dad's is 3x. Therefore, in 15 years Tom will be x+15 years old and his dad will be 3x+15 years old. Since the sum of their ages will be equal to 102, we can formul...
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Answered by Ewelina F. • Maths tutor
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Plan an experiment that would allow you to determine the maximum voltage that can be achieved using strips of lithium, zinc, copper and aluminium.

i) Pick electrolyte (e.g. hydrochloric acid) - strong acid ii) Use same volume of electrolyte; Use same electrolyte throughout; iii) Cut same size strips; Connect wire to each metal; Connect to voltmeter; iv...
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Answered by Baranse O. • Chemistry tutor
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Name two organelles that are present in a plant cell that are not present in an animal cell and state their functions?

There are many organelles you could choose from so long as it is only present in plant cells and you can explain it's function it is appropriate. Examples include:Cell wall - provides structural support made...
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Answered by Thomas B. • Biology tutor
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I can never think of anything to write during French Creative writing exams, what can I do?

Always remember that although the exam title has the word 'Creative' in it, it is still an exam and the examinator wants you to show off what you know. Preparation and simplicity is the key. Depending on the...
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Answered by Olivia L. • French tutor
2480 Views

Why does the translation y=f(x+2) translate the graph f(x) 2 units left instead of 2 to the right?

It seems like f(x+2) should translate the graph y=f(x) 2 to the right, it is +2 inside the bracket after all? However, if we think of the translation as actually subbing in x+2 into the equation y=f(x), it m...
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Answered by Seth H. • Maths tutor
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