Answer:
9.5
Step-by-step explanation:

Divide 60 by both sides

2850*24/(4*24+18)
The light bulb consumes 600 watt-hours per day.
Answer:
The system of equations is

Step-by-step explanation:
Let
x------> the number of videos of new releases
y-----> the number of classics videos
we know that
------> equation A
------> equation B
Using a graphing tool
Solve the system of equations
Remember that the solution of the system of equations is the intersection point both graphs
The intersection point is 
see the attached figure
therefore
the number of videos of new releases is 
the number of classics videos is 