Answer:
3 N to the right
Explanation:
There are two forces acting on the car:
- A force of 10 N towards the right
- A force of 7 N towards the left
Therefore, the net force is given by the difference between the two, since they are in opposite directions:

And the direction is to the right, since the force to the right has greater magnitude than the force to the left.
Answer:f 30
Explanation: I am not really sure but try this
Answer:
v=wavelength ×f
wavelength=v/f=455/655=0.694m