You have the magnitudes and angles with the x-axis of each vector. To find the resultant vector you need to convert these into vector components, and add them all together.
So first of all solve for the x-component:
Next for the y-components:
So your resultant force vector is:
And you can calculate the magnitude using pythagoras, and the direction using basic trig.
Once you have these:
Will give you the magnitude of your acceleration. And its direction will be the smae as that of the force vector.