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Pythagoras: If you have a right angled triangle PQR, and length PQ=5cm, length QR=8cm (which is the longest length), then calculate length PR to two decimal places.

Pythagoras' theorem is: a^2+b^2=c^2 (a=short side, b=short side, c=longest side/hypotenuse, ^=squared). Now applying that to this question would mean that a=PQ, b=PR and c=QR. So we can use the figures given...
PS
Answered by Pree S. • Maths tutor
12639 Views

What's the best way to prepare for the listening exam?

Consistency is key! The best thing to do is to start early on in the year and keep at it. You don't even need to dedicate huge amounts of time to listening practices as you can download some podcasts or song...
TM
Answered by Tamika M. • French tutor
3611 Views

How can I best prepare for an English Literature exam?

The best way to prepare for an English exam is (having read the texts) to explore the themes within the text, as these are likely to form the basis of the exam questions and it will also give you a more thor...
KE
Answered by Kathryn E. • English tutor
3591 Views

One form of muscle disease is caused by a mutant myosin allele. It prevents myosin from binding to other myosin molecules, thus preventing contraction. Suggest why.

Sarcomeres are formed of myosin and actin filaments which are interleaved. If myosin cannot bind to each other then thick filaments cannot be formed. Thus, there is nothing to anchor myosin so actin cannot b...
JW
Answered by Jade W. • Biology tutor
11678 Views

3 postitive whole numbers have a mean of 6. What is the greatest possible range of the numbers?

15: (x+y+z)/3 = 6 so, x+y+z = 18.Range = highest number - lowest number. For the max range, at least 1 of the numbers must be 1. 1,1,16. 16-1 = 15
JW
Answered by Jade W. • Maths tutor
7728 Views