It costs Johnny $15 a month plus $1.50 per song to download music. This situation is represented by the expression 1.5x + 15, wh
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If Joe and Eugene are travelling in opposite directions, their total distance is 360 km.
Eugene's speed = 70 km/hour
Let Joe's speed be = x
They each travel for 3 hours, so time = 3 hours
Distance = speed * time
Hence, Joe's speed is 50 km per hour.