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Shape ABCD is a parallelogram. Y is the mid-point of AB and Z is on BC such that BZ=1/2ZC. Given that AB=a and BC=b, describe, in terms of a and b: a) AC b)CY c)YZ

a) AC = a + b b) CY = -b -1/2a c) YZ = 1/2a + 1/3b
MC
Answered by Matthew C. • Maths tutor
5288 Views

Thomas wants to see how far he can throw a javelin. He records four of his throws as 45 metres, 40 metres, 55 metres, and x metres. Given that the mean of Thomas' throws is 50, determine the value of x.

Answer is 60.
MC
Answered by Matthew C. • Maths tutor
3693 Views

How do I conjugate the perfect tense?

In French, the perfect tense is a past tense. It translates to 'I did' or 'I have done'. It is formed by using not one, but two verbs. Perfect tense = subject + auxilary verb + past participle The auxilary i...
HJ
Answered by Harriet J. • French tutor
3978 Views

Show that (n^2) + (n+1)^2 + (n+2)^2 = 3n^2 + 6n + 5, Hence show that the sum of 3 consecutive square numbers is always 2 away from a multiple of 3.

Expanding out the Brackets: (n 2 )+ (n 2 + n + n + 1) + (n 2 + 2n + 2n +4) = (n 2 ) + (n 2 +2n+1) + (n 2 +4n+4) =3n 2 + 6n +5 Using this result: Three consecutice numbers: n, n+1, n+2 So three consecutive sq...
JC
4213 Views

How are the lungs specialised for exchanging gases?

The lungs are made up of many air sacs called alveoli. The alveoli have many folds which create a large surface area. The larger the surface area, the greater the area of alveolar cell membrane available for...
LA
Answered by Laura A. • Biology tutor
3695 Views