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How to solve rates of change questions?

If the question is about something losing value, for example a cars value depreciates at a rate of 30% a year after 4 years how much will the car be worth? You are also given that at year 0 it was worth £10,...
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Answered by Emma W. • Maths tutor
6888 Views

How do I solve quadratic equations by factorization?

Consider the equation x^2+5x+6=0. In order to factorise this equation you first need to think of what numbers sum to make 5 (the coefficient of x) and whose product equals 6 (the number not multiplied by x)....
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Answered by Ricardo F. • Maths tutor
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Describe what happens when two atoms of potassium react with one atom of sulfur giving your answer in terms of electrons.

Electrons are transferred from potassium to sulfur. Two potassium atoms each lose one electron forming K+ / 1+ ions. Sulfur atoms gain 2 electrons forming S2- / 2- ions.
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Answered by Sabrine H. • Chemistry tutor
5325 Views

TMV can cause plants to produce less chlorophyll. This causes leaf discoloration. Explain why plants with TMV have stunted growth.

Chlorophyll is a pigment molecule produced by plants that they use to absorb light energy (photons), which is needed for the light dependent section of photosynthesis. Photosynthesis makes glucose, the energ...
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Answered by Dominic V. • Biology tutor
4076 Views

Re-arrange [4x+ 9t + 8s= 3g] to make x the subject of the formula

First we need to get everything that is not x on to one side. This will then leave us with 4x=3g- 8s-9t. Now we need to remove the coefficient of x which will result in x=1/4(3g-8s-9t)- as we have x on its o...
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Answered by Vaidik P. • Maths tutor
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