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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

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 struct...

Answered by Jess B. • Chemistry tutor

10597 Views

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 nu...

Answered by • Chemistry tutor

2537 Views

Which are the main verbs that take the past tense with Être?

DR MRS VAN DER TRAMP
DevenirRevenir
MonterResterSortir
VenirAllerNaitre
DescendreEntrerRentrer
TomberRetournerArriverMourirPartir

Answered by Natasha N. • French tutor

1474 Views

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 tru...

Answered by Connor C. • Psychology tutor

3482 Views