If A=3i+2j and B=j+2k then find A+B and A-B

You simply have to sum corresponding coordinates with each other.

Vector A is (3,2,0), meaning that its i-coordinate is 3, its j-coordinate is 2, and it has no k coordinate (it's zero).

Similarly, vector B is (0,1,2), meaning that its i-coordinate is 0, its j-coordinate is 1, and its k-coordinate is 2.

So, the sum of the i-coordinates is 3+0=3

The sum of the j-coordinates is 2+1=3

The sum of the k-coordinates is 0+2=2

So, the sum vector is A+B=(3,3,2)=3i+3j+2k.

For A-B, you can work in the exact same way, but you'll subtract the coordinates instead of adding them.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

well clustered together.

points close on a scatter diagram