Help anyone 5 questions only Answers just need correction if needed

Question

anonymous · Answer

1.b
2.a
3.d
4.c
5.c

anonymous · Answer

@jim_thompson5910 anyone?

lasttccasey · Answer

1. A
2. B
3. C
4. D
5. B

lasttccasey · Answer

Do you know how to use the quadratic formula?

anonymous · Answer

yes i get confused sometimes but i know how to use it its -B+-sqrtb^2-4ac/2a right?

lasttccasey · Answer

Yes$$\frac{ -B \pm \sqrt{B^2-4AC} }{ 2A }$$

anonymous · Answer

I have 5 more with answers can you help me ?

lasttccasey · Answer

Sure but I want you to know how to do this. Do you want me to walk through the 1st one with you real quick?

anonymous · Answer

sure lets walk threw the 1st of the other ones k

anonymous · Answer

1.not sure whats the answer 
2.b or a 
3 c
4 a
5.c or b

lasttccasey · Answer

This website goes through the process fairly well for these problems: http://hotmath.com/hotmath_help/topics/finding-the-equation-of-a-parabola-given-focus-and-directrix.html Its easier to follow this for the parabolic equations that trying to explain it through text. I'll see if I can get the answers real quick though.

anonymous · Answer

k ill take notes on the subject while you do that thanks by the way :)

lasttccasey · Answer

Okay and its not a problem. 
1. C
2. D
3. C
4. B
5. D

anonymous · Answer

thanks for the help :)

lasttccasey · Answer

Basically (x-a)^2+(y-b)^2=(y-d)^2, where (a,b) are the focus and y=d is the directrix. Hope that helps!

anonymous · Answer

yes it does :)

lasttccasey · Answer

You're welcome :)