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Maths
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Express 4x/(x^2-9) - 2/(x+3) as a single fraction in its simplest form.

Please refer to the link below as I found it very difficult to demonstrate the answer and couldn't seem to access the whiteboard function.file:///C:/Users/exr854/OneDrive%20-%20University%20of%20Birmingha...

ER
Answered by Ethan R. Maths tutor
3359 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
2810 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 re...

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Answered by Alice D. Maths tutor
4544 Views

Show that the two vectors A= 2i+3j-k and B=3i-j+3k are perpendicular

We know that two vectors are perpendicular when their dot product is equal to 0. As you can see from the SQA Higher Maths formula sheet, the equation for the dot product is; A.B=a1b1+a2b2+a3b3.To...

SC
Answered by Samantha C. Maths tutor
6065 Views

How do I solve x^2 > 6 - x

To solve this question we want to find the range of values that x can be to make the statement true. First we must treat it like a normal quadratic equation and move all ...

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Answered by Ben H. Maths tutor
4203 Views

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