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f(x)= 5 - x and g(x)= 3x + 7. Simplify f(2x) + g(x-1) (2018 past paper question)

If f(x)= 5 - x then f(2x)= 5 - 2x If g(x)= 3x + 7 then g(x-1)= 3(x-1) +7 = 3x - 3 + 7 = 3x +4 So f(2x) + g(x-1) = 5 - 2x + 3x + 4 = 9 + x
JB
Answered by Jess B. • Maths tutor
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Explain why graphite conducts electricity in terms of structure and bonding.

Graphite has a giant covalent structure where each carbon atom is covalently bonded to three other carbon atoms. Each carbon atom also has one delocalised electron which can flow freely through the structure...
JB
Answered by Jess B. • Chemistry tutor
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Describe the trend in ionisation energies down group 1.

Ionisation energies decrease going down group 1, firstly since the number of shells in the atom increases so the atomic radius is increased. There are also more electrons between the positively charged nucle...
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Which are the main verbs that take the past tense with Être?

DR MRS VAN DER TRAMP DevenirRevenir MonterResterSortir VenirAllerNaitre DescendreEntrerRentrer TomberRetournerArriverMourirPartir
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Answered by Natasha N. • French tutor
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Briefly evaluate one of that you have outlined in your answer to the previous question 3 marks

One weakness of the authoritarian personality explanation is, many Nazi’s obeyed during the holocaust and through WW2. This explanation would claim that they all have the same personality which is not true. ...
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Answered by Connor C. • Psychology tutor
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