What is the sailboats acceleration if a sailboat and its crew have a combined mass of 655 kg If a net force of 895 N is pushing the sailboat forward?

newtons is a measurement of force

just substitute that for the sign "N"

so you say that there is 895N per 655kg, so 895kg*m/s*s/655kg

then you cross out the "kg" and do the math, not too bad