Final answer:
The cost will be the same for both companies when 10 video streams are streamed.
Step-by-step explanation:
To find the number of video streams for which the cost will be the same for both companies, we need to set up an equation and solve for the variable s.
For company A, the cost is $40 membership fee plus $2 per video stream: C = 40 + 2s.
For company B, the cost is $20 membership fee plus $4 per video stream: C = 20 + 4s.
To find when the costs are equal, we set the two equations equal to each other and solve for s:
40 + 2s = 20 + 4s
Subtracting 2s from both sides:
40 = 20 + 2s
Subtracting 20 from both sides:
20 = 2s
Dividing both sides by 2:
10 = s
So, the cost will be the same for both companies when 10 video streams are streamed.