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A ladder 6·8m long is leaning against a wall. The foot of the ladder is 1·5m from the wall. Calculate the distance the ladder reaches up the wall.

We have a right angle triangle in this problem. We can use Pythagoras' theorem - the square of the hypotenuse is equal to the sum of the squares of the other two sides of the right angle triangle . We will d...
MV
Answered by Mohan V. • Maths tutor
4077 Views

[equ1] 3y − 6x = 3 [equ2] y y x 2 − x + 2 2 = 2

Firstly start by rearranging [equ1] to get y = 2x + 1 . Then substitute this result into [equ2] this will give you (2x + 1) (2x ) x . Simplify the equation and subtract two from both sides to 2 − x + 1 + 2 2...
AS
Answered by Alistair S. • Maths tutor
4821 Views

The components of DNA and how they interact to form a double helix structure

(Answer supplemented with whiteboard annotations) The structure of DNA consists of three pivotal structures. A deoxyribose pentose sugar made up of five carbons. An ionised phosphate group and a nitrogenous ...
MR
Answered by Mizanur R. • Biology tutor
3801 Views

How do I construct the French conditional tense for regular verbs?

To make the conditional tense in French you need to take the infinitive form of the verb, the form found in the dictionary, and add an ending onto it. These endings are: Je (I) - ais Tu (You) - ais Il/Elle/O...
HW
Answered by Henry W. • French tutor
2743 Views

On a packet of brown rice it says 'When 60g of rice is cooked, it will weigh 145g.' If Katy has 100g of brown rice, how much will it weigh when cooked?'

Find by what ratio the weigh of rice has increased. If the rice increases in weight from 60g to 145g, the factor by which it increases is: (145/60) = 2.4166... Multiply the amount of rice Katy has by this fa...
BO
Answered by Ben O. • Maths tutor
15824 Views