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If a student wishes to have a ratio of 2:7 red pens to yellow pens in their pencil case: a) if they have 50 pens total what is the maximum amount they can carry with them b) if they have 18 red and 31 yellow what is the maximum amount they can carry

a) 50 pens total. 2 + 7 = 9. Number of pens is done in 9s. 50/9 = 5r5, so multiple of 5. Then 2 5 + 7 5 pens. 10 red and 35 yellow, 45 pens b) 18 red / 2 = [9]r0 31 yellow / 7 = [4]r3 So could have 9 sets of...
HF
Answered by Henry F. • Maths tutor
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Solve 9x +1> 2x +3

9x - 2x> 3-17x > 2x > 2/7
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Answered by Suruthi G. • Maths tutor
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Describe how carbon dioxide helps maintain temperature on Earth

Carbon dioxide allows radiation of short wavelengths to pass through the atmosphere to the Earth and absorbs any outgoing radiation that has long wavelengths.
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Answered by Suruthi G. • Chemistry tutor
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How should I structure a 6 mark literature question?

Firstly you should specify what exactly the question is looking for (i.e. how does the language used convey a sense of urgency). Make sure your responses are focused on that topic. The three points you make ...
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Explain the different types of conditioning.

There are 2 main types of conditioning in Psychology, namely classical conditioning and operant conditioning. Classical conditioning is best known with the experiment involving Pavlov's dog. He first noticed...
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Answered by Yvonne T. • Psychology tutor
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