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solve; (6x - 2)/2 - (4x+7)/3 = 1-x

numerical answer x =-1/8 oe (or equivalent), but I am more interested in the method used My method simplify first fraction to 3x-1, multiply both sides by 3, collect like terms, divide through to get x on it...
RL
Answered by Ruth L. • Maths tutor
3865 Views

How is DNA replicated?

DNA replication is a multi stage process which is carried out in the nucleus of the cell. We know that DNA is in a double helix structure and for replication to occur it must be unwound into two single stran...
WG
Answered by William G. • Biology tutor
4450 Views

There are N counters in a bag, 4 being red and the rest being blue. I take two counters at random from the bag (without replacing the first).The chance i take two blue counters is 1/3, See below in the answer box

Show that n^2-13n+30=0We note that 4/N denotes the probability of a me picking a red counter and (N-4)/N denotes the chance of me picking a blue counter.Since I select two counters and do not replace the fir...
RP
Answered by Roshan P. • Maths tutor
8467 Views

Using the diagram and your knowledge of vectors, show that BCD is a straight line

BC = BA - CA = (3a - b) - (a + 4b) = 2a - 5b BD = BA + AB = (3a - b) + (a - 9b) = 4a - 10b BC = 1/2 BD. Using basic vector rules, we know that if vectors are multiples, then they are parallel. Since BC and B...
JA
Answered by Jonathan A. • Maths tutor
19386 Views

How can you use roots of in Arabic to form different words?

Arabic is a very formulaic language, and you can use this to your advantage! Arabic words are derived from basic root words, usually comprising of three letters. Let's use the example of كتب ., which is a ve...
SH
Answered by Sam H. • Arabic tutor
3314 Views