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First you want to find out how many coins there are in bag A. So how many 20p coins do you need to make £7.20? This is the same as 720p. 720 divided by 20 is the same as 72 divided by 2 which is 36. So...

Both epic heroes share some common features derived from the Homeric texts, but also some substantial differences. 
Aeneas and Achilles are both mighty heroes. They are descirbed with honorific epith...

Integrating the acceleration function gives the velocity function v, as below:
v = t² +5t +C₁, where C₁ is a constant.

Integrating the velocity func...

This is like solving 2 simultaneous equations. Both equations are in a form of y=ax^2+bx+c. Equate both equations together and you got:
3x²+5x+12 = 3x-8

Put both polynomi...

The temperature of the surrounding is decreased because energy is taken into the reaction. An example of this is two solutions A and B being mixed and the resultant product mixture having lower tempera...