Top answers

Factorise and solve X^2+8X+15=0

For any equation in the form ax^2+bx+c and a=1, the first step is to find a set of numbers. In this case, they must add up to 8 (b) and multiply to 15 (c). With trial and error, it can be found that these ar...
JA
Answered by James A. • Maths tutor
3818 Views

Solve the inequality 5x - 7 > 2x +5

What does this inequality sign mean? That A "is greater than" B. We can treat inequalities as if they are = signs as long as we don't multiply or divide by negative numbers. What would happen then?...
CC
Answered by Camilla C. • Maths tutor
9275 Views

Describe the differences in cell structure between animal, plant and bacterial cells

Cells are the micro building blocks of all living organisms, and though there are many different kinds allowing us to have many different functions, we will focus on the basic ones associated with animals, p...
AS
Answered by Anna S. • Biology tutor
3514 Views

Explain how eutrophication can lead to the death of aquatic organisms? (6 marks)

1 - Fertilisers (eg NPK) used in agriculture are washed into local water sources such as rivers and lakes by rainwater/surface run off 2 - These nutrients enable algae to grow, leading to the formation of al...
AW
Answered by Amy W. • Biology tutor
5643 Views

What are the definite articles in Italian and how do I know which one to use?

PS
Answered by Penelope S. • Italian tutor
2847 Views