 So again in lecture sometimes I go a little bit beyond what's on your worksheet So I want to give you one more example Not on your worksheet of one of these vector math problems It's a little bit more complicated and more complicated than you'll be doing right away But it's a plus 1.5 times C What's that going to equal? Well the first thing you want to remember is that if I've got 1.5 times C This has higher precedence than the addition So when I go to do my math I want to make sure that that 1.5 times my C vector gets done first So I've gone ahead here and put in the actual values for a and for C But I'm going to remember I want to do this second part first So I've got 1.5 times the zero for the I had Plus my 1.5 times the 1.7 for the J hat So I'll go ahead and do this multiplication first And when I simplify those things well 1.5 times zero is zero 1.5 times 1.7 put that in my calculator that gives me 2.55 J So now that I've done this Specification part now I can expand back out and look at the addition again So again, I've got my original a But now I'm adding to it not just C, but 1.5 times C Once again, I want to take the I components and group them together and the J Components and group them together So that's going to give me my two I components the three and the zero put together And my two J components the 2.5 and the 2.55 put together and When I simplify that math, of course three plus zero is just three and 2.5 plus 2.55 Gives me 5.05 J So this is an example of doing vector math where there's actually Multiple math calculations and you have to follow the same order of operations that you would do in a regular algebra problem Keep something like this in your nodes for further reference, but it doesn't have to be on your worksheet