Anyone good in Pre-Calculus?

Question

campbell_st · Answer

what is the question

imstuck · Answer

That's a very vague question.  Could be a yes and could be a no!  Whatcha got for us?

anonymous · Answer

attachment

anonymous · Answer

I cant figure out why it keeps saying error in my calculator

campbell_st · Answer

well is it because B and C aren't the same size... 

B is a 3 x 3 matrix and C is a 1x3 matrix...

anonymous · Answer

Why do they have to be the same?

campbell_st · Answer

Well I thought for adding and subtracting they needed to be the same side

but I haven't done them for ages

anonymous · Answer

ohh okay

campbell_st · Answer

my only thought is you can find 3B 

by multiplying every term in B by 3... and write new matrices 

3B - C   and then write not solution because of different sizes..

campbell_st · Answer

oops 3B + C

anonymous · Answer

thank you(:

anonymous · Answer

Could you help me with one more thing?

campbell_st · Answer

ok... if I can

anonymous · Answer

I dont really understand how to separate this function into f(x) and g(x)

campbell_st · Answer

well looking at it i'd use 

f(x) = x^2   and g(x) = x^2 + 6

so then 

$$F(x) = \frac{f(x)}{g(x)}$$

that seems the most obvious to me

anonymous · Answer

ohh okay I though it was going to be that but I wasn't positive on this one. Thank you.

campbell_st · Answer

glad to help