Top answers

Describe the life cycle of a virus.

Attachment. A virus, for example a bacteriophage attaches to the surface receptor of the host bacterial cell.Penetration. The virus injects the viral DNA genome through the cell wall and the cell membrane an...
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Answered by Celine A. • Biology tutor
4196 Views

Find the Maximum Point of this curve - -X^2 -7X -20

(-7/2,-31/4)
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Answered by Vishvan N. • Maths tutor
3690 Views

How to complete the square to find the value of x?

To complete the square you compare your equation in the form x 2 + bx + c = 0 to a similar equation of (x + b/2) 2 + c = 0 . From expanding out the second equation we have x 2 + bx + (b/2) 2 + c = 0 we can s...
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Answered by Ayotunde A. • Maths tutor
4039 Views

Factorise x^2 -7x+10, and hence solve x^2-7x+10=0

Firstly, it is important to recognise that the answer will need to be in the form of two pairs of brackets because the question is asking us to factorise a quadratic equation. The equation only has a single ...
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Answered by Gareth T. • Maths tutor
6633 Views

How do you know if a noun is feminine and needs la' before it or if a noun is masculine and needs 'le'?

This is one of those questions that doesn't have a straightforward answer and it is only through experience of the language that one learns the gender of each noun. However, there are some noun endings that ...
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Answered by Natasha G. • French tutor
2417 Views