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Describe the three main types of bonding?

Ionic bonding - occurs between a metal an a none metal. Electrons are transferred between two atoms to form ions - atoms with either a positive or negative charge. Ionic bonding occurs because of the strong ...
KM
10637 Views

How do you solve a simultaneous equation by 'substitution'?

Firstly, demonstrate with an example: Solve: 3x + y = -9 and x 2 + 2x - 3 = yRearrange the first equation to get "y" by itself by moving parts of the equation to the other side e.g. y = - 9 - 3xSub...
SH
Answered by Sophie H. • Maths tutor
3327 Views

What is the length of the hypotenuse of this right angled triangle?

Pythagoras theorem can be used to calculate the length x of the triangle. The length of the hypotenuse is equal to the square root of a 2 + b 2 . When given length a and b, you are able to calculate this len...
CA
Answered by Callum A. • Maths tutor
4125 Views

Using examples, explain the difference between above-the-line and below-the-line promotional strategies. (4 marks)

Above-the-line and below-the-line promotional strategies are two types of marketing methods which fall under promotion in the marketing mix built up using the 4Ps (Price, Promotion, Place, Product).Above-the...
VG
7634 Views

Why do some past participles agree, even with 'avoir'?

The general rule is that past participles taking 'avoir' as the auxiliary do not agree. However, consider this example:"Avez-vous acheté la voiture ?" "Oui, je l' ai acheté e hier."You wi...
DF
Answered by Daniel F. • French tutor
2283 Views