Video streaming company a charges a one-time $40 membership fee and $2 per video stream. video streaming company b charges a one-time $20 membership fee and $4 per video stream. let the variable s represent the amount of videos streamed and let the variable c represent the cost. for how many video streams will the cost be the same for both companies? which system of equations can be used to solve this problem? a: {c=40s+2c=20s+4 b: {c=42sc=24s c: {c=40−2sc=20−4s d: {c=40+2sc=20+4s