Top answers

Simultaneous questions: 2x+y=7, 3x-y=8

First of all, you want to get both of the questions equating to y as this is a common factor between the two equations. SO y=7-2x and 3x-8=y As both of the equations are equal to y, we can set them equal to ...
BJ
Answered by Bronnie J. • Maths tutor
3417 Views

2 resistors of resistances 150 ohms and 5000 ohms respectively are in series with each other. They both are also in parallel with a 1000 ohm resistor. What is the total resistance?

Firstly, you should start by working out the total resistance for the 150 ohm and 5000 ohm resistors which are in series : -In series the total resistance is given as the sum of the resistance of each indivi...
GJ
Answered by Gaggan J. • Physics tutor
2660 Views

Provide and explain one example of natural selection

For natural selection to occur, four conditions must exist. The first is that the population reprodces enough for there to be competition for resouces and survival between the members. The second is that par...
CM
3749 Views

Explain what causes the conduction of impulses along a non-myelinated axon to be slower than along a myelinated axon.

In myelinated axons, the myelin sheath that surround the membrane prevents action potentials forming, hence depolarisation only occurs at the nodes of Ranvier (breaks in the sheath, exposing the membrane, at...
RO
Answered by Ruby O. • Biology tutor
10643 Views

Arabic Speaking Exam: Describe what you did this weekend

‏في نهاية هذا الأسبوع ذهبت الى البحر مع عائلتي و تناولنا في مطعم عربي. بعد ذلك ‏ذهبت إلى السينما مع أصدقائي وشاهدنا فيلم رعب وتعشينا في بيت احد من أصدقائي. ثم ذهبت إلى ‏منزلي ونمت نوم عميق.
CM
Answered by Christelle M. • Arabic tutor
2402 Views