Search our library of homework questions

Top answers

All subjects

All levels

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, leadin...

Answered by Amy W. • Biology tutor

4581 Views

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

Answered by Penelope S. • Italian tutor

2220 Views

how do i calcualte the length of an unknown side of a right angled triangle

To calculate the length of the unknown side you must know the lenght of two of the other sides of the right angled triangle. if we know this we can use pythagoros thereom. The equation for this is a^2+b^2...

Answered by Callum L. • Maths tutor

3724 Views

If f(x) = x^2 - 3x + 2, find f'(x) and f''(x)

f'(x) is the first derivative of f(x) therefore f'(x) = 2x - 3

To find f''(x) simply take the derivative of f'(x), therefore f''(x) = 2

Answered by Peter O. • Maths tutor

4237 Views

Solve the simultaneous equations 3x + 2y = 4 and 4x + 5y = 17

3x + 2y = 4 (equation 1) 4x + 5y = 17 (equation 2) Multiply equation 1 by 2.5, giving 7.5x + 5y = 10 (equation 1) 4x + 5y = 17 (equation 2) Subtract equation 2 from equation 1, giving 3.5x = -7 Therefore,...

Answered by Isabella G. • Maths tutor

3692 Views