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f is a function such that f(x)=2/(3x-3) Find the inverse function and ff^-1

As demonstrated on whiteboard
KM
Answered by Kieran M. • Maths tutor
4195 Views

Write me a descriptive piece of writing.

I would then check the students piece of writing, pointing out the need for paragraphs. We could then brainstorm different adjectives they could have used. I would also tell them my trick to describe the 5 s...
JW
5229 Views

Which is heavier, a ton of feathers or a ton of lead?

They're both the same. The feathers would take up a lot more space though! Feathers have a lower density than lead (i.e. for the same volume, feathers are less heavy). In practice, if you drop a tonne of fea...
FN
Answered by Francis N. • Physics tutor
20308 Views

Joe buy a pack of 7 chocolate bars. The pack costs £5.97, Joe sells all 7 chocolate bars for 87p each. Work out Joes percentage profit to 2 decimal places.

7 x £0.87 = £6.09(6.09/5.97) x 100 = 102.01%so percentage profit is 2.01% to 2 d.p.
JL
Answered by Joel L. • Maths tutor
3120 Views

Why do we bother using surds?

Surds are exact - they can’t be rewritten as a decimal or fraction without introducing a rounding error. If we’re using numbers in a calculation, keeping them as exact as possible until we round to the requi...
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Answered by Alice D. • Maths tutor
5325 Views