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rearrange the equation y=7x-3 to make x the subject

The first step would be to have the x's on their own so add three to both sides so the equation goes from y=7x-3 to y+3=7x. The current subject is 7x= we need x= so both sides need to be divided by 7. This l...
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Answered by Sam G. • Maths tutor
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Describe the forces acting on a skydiver over time, from the moment she jumps out of the plane until hitting the ground and the effect this has on her velocity. What happens when she opens her parachute?

When the skydiver first steps out of the plane, she accelerates downwards at a high rate. At first the resultant force on her is large since gravity pulls her down, but since she is moving slowly the force f...
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Answered by Siobhan P. • Physics tutor
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What should you include in a close analysis of an extract from a Shakespeare play?

When writing a close analysis of a scene from a play it is very important to briefly state the context of the scene - what has happened before the scene/ what is happening during the scene/ what happens afte...
DB
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What should I include in an introduction for a 25 mark question in a history a level paper?

Your first sentence should mirror the question - your examiner should be able to tell what the question is just by reading this sentence. Your introduction should outline the three main points/themes which y...
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Answered by Delphi B. • History tutor
5886 Views

You and your lab partner have isolated a strand of DNA which you wish to amplify. You decide to carry out a polymerase chain reaction. Describe the 3 main temperature changes that occur and what key events happen at these stages.

The polymerase chain reaction (PCR) involves many cycles of heating and cooling in order to amplify a section of DNA. You initially heat the DNA to 92 C : this denatures you double-stranded DNA so that you h...
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Answered by Amy A. • Biology tutor
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