Hey there! 
If you're working with Newton's Laws / Acceleration, the formula would mostly like look like this 
 or you could say → 
 
While the 
 variable represents 
 
 of your car and the 
 represents the mass of the car 

Denominator: 

Numerator: 

Your equation: 
 ( if you simplify that ←) then you have found your result! 

Good luck on your assignment and enjoy your day! 
~
