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Rearrange, 5(a + b)= 2ab , to make 'a' the subject

The question is asking for 'a' to be the subject and therefore our aim is to result in an answer with the form 'a='. The first step is to expand the brackets on the left hand side by multiplying 'a' by 5 and...
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Answered by Meera M. • Maths tutor
11442 Views

Two snails belong to the same species. Yellow shelled snails found in grassland areas, dark shelled ones in woodland. Shell colour determined by genes. Explain how natural selection could have caused this distribution of snails

The yellow banded shell provides camouflage to the snail in grassland areas. These are more difficult for the birds to see, so less are eaten by predation. As a consequence, more yellow banded snails survive...
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Answered by Leah B. • Biology tutor
5130 Views

What are the differences between diffusion, osmosis and active transport?

Diffusion is the net movement of particles in solution across a partially permeable membrane. The net movement of particles is from higher to lower concentration gradient. Osmosis is the net movement of wate...
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Answered by Thomas W. • Biology tutor
14694 Views

Describe the conducting circuit in the heart

The heart is a muscular pump which pushes blood out to the body. It does this by contracting the muscle fibres which sqeezes the blood out. The heart has 4 chambers. Blood comes into the top two chambers, ca...
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Answered by Clodagh M. • Biology tutor
3665 Views

Solve the equation 3x^(2)-7x+3 giving your answer to three significant figures.

Since there is no further factorisation possible we use the quadratic formula x=[-b±√(b 2 -4ac)]/2a. From the equation in question we have a=3, b=-7, c=3. Substituting into the quadratic formula x=[7±√((-7) ...
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Answered by Benjamin H. • Maths tutor
5283 Views