A roadster undergoes a uniform acceleration of 7.5 m/s2. If the force causing the acceleration is 5560 N, what is the mass of the car?

Distance^2= yellow line ^2 (see picture) = 30^2 + 49^2so distance = squareroot of (300^2 +49^2)i dont know if this is how to solve it, but i cnt think of another way