vector

http://prnt.sc/b4b15n

part b) is 3/4b right? could you write just that because that is one of the ways to get from O to P or do you have to write 1/4 a as well because that is another way you could get there.

no matter which route you take, the answer should be the same.
To get from O to P, you could do:

ugh hate vectors

Really? They're one of my favourite bits in maths so far
Do you understand where you went wrong in this question?

Yeah, haha; you need to teach me.

lol post any vector questions here if you get stuck and I'm sure everyone will help out

http://prntscr.com/b4cif7 well I'm stuck on this, this is how far i got what do i do from here

Ah okay, you've done everything correctly - now all you have to do is simplify it
It's just a case of multiplying out that bracket and adding the terms together.

http://prnt.sc/b4cqtu like that???

Yes

I personally find it easier sometimes to use decimals like:
a - 0.75a + 0.75b but what you did is perfect

Now do you know how to tidy that expression up a little?
(ie. what to do with: a + -3/4a + 3/4b)

http://prntscr.com/b4cu91 that?

No, what did you do to get to that?
What you want to do is 1 - 3/4 for the a term and then leave b as it is

Where does 1 come from ? ugh im confused

you have the expression:
a + -3/4a + 3/4b

a is the same as 1a, we just don't put the 1 there as it adds no meaning.

I'm guessing we need to go over fractions?

Example 1:
2/3 - 1/6
To add/subtract fractions, you must have a common denominator.
The lowest common multiple of 3 and 6 is 6, so you want the denominator of both fractions to be 6.

2/3 can be written with 6 as the denominator if you multiply the fraction by 2/2 (you are not changing the value as 2/2 is the same as 1)
2 * 2 = 4, 3 * 2 = 6. So you get 4/6.

Now you can subtract the fractions.
4/6 - 1/6 = (4-1)/6 = 3/6 --> you can then simplify this to 1/2.

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Now can you do 1 - 3/4, and see how this would link to the question?

Yeah 1/4 lmao but I don't see how it links one bit

because you have 1a and you want to subtract 3/4a?
Sorry I'm not very good at explaining and have no idea how else to put it??

1a - 3/4a = 1/4a

add this to the b part and you have:
1/4 + 3/4b

They're one of my favourite bits in maths so far