Search our library of homework questions

Top answers

All subjects

All levels

If a right angled triangle has its longest side 7cm and another side is 4cm then how long is the other side of the triangle? Show your working

Right angle means use Pythagorus:
a² + b² = c²
thereforea² = c² - b² = 7² - 4² = 49-16 ...

2956 Views

You are asked to choose from the meal deal at school, there are 9 varieties of sandwich, 6 varieties of snack and 8 varieties of drink. The meal deal consists of a sandwich, snack and drink - how many different combinations of meal deal are there?

As described, the meal deal consists of 1 sandwich, 1 snack and 1 drink. To work out the number of combinations possible you times the number of available sandwiches, by the number of available snacks, by...

Answered by Frances C. • Maths tutor

11287 Views

Solve simultaneously: 2x + y = 18 and x - y = 6

Make both equal to y:y = 18 - 2xy = x - 6Make both equal to each other:18 - 2x = x - 63x = 24x = 8Substitute x into one of the original equations:x - y = 68 - y = 6y = 2So x = 8 and y = 2

Answered by Tutor406540 D. • Maths tutor

2892 Views

Explain why graphite can conduct electricity

Each carbon atom forms covalent bonds with three other carbon atoms and one electron from each carbon atom is delocalised.It is these delocalised electrons which allow electricity to be conducted as they ...

Answered by Tutor406540 D. • Chemistry tutor

6650 Views

Why does oxygen bind to haemoglobin easier the second time?

Binding the first oxygen molecule leads to a change in the tertiary structure of haemoglobinThis uncovers the second haem binding site for another oxygen molecule to atta...

Answered by • Biology tutor

2864 Views