Solving triangles using sine and cosine please help!

Ok so I have to sovle these triangles the first one it tells you to use cosines the others need to be figured out Please Help!! I would appreciate if someone would answer all three, please, thanks!

Use the Law of Cosines to solve the triangle given the following information.
Round your answers to the nearest tenth for degrees and to the nearest hundredth for sides.
A=55 degrees
b=3
c=10
find what
a=_____
B=_____degrees
C=_____degrees


Use the information to solve the triangle.
Round your answers to the nearest tenth for degrees and to the nearest hundredth for sides.
X=24.3 Degrees
Z=54.6 Degrees
z=2.68
Find what
x=____
y=____
Y=____degrees


Use the information to solve the triangle.
Round your answers to the nearest tenth for degrees and to the nearest hundredth for sides.
q=80
r=60
s=100
Find what
Q=_____Degrees
R=_____Degrees
S=_____Degrees


Please help! Thanks so much to anyone who helps! (:

Khan Academy on Basic Trigonometry:

https://www.khanacademy.org/math/trigonometry/basic-trigonometry/basic_trig_ratios/v/basic-trigonometry