Help plz will give brainliest

1. what are the missing reasons in the proof 2. it's in the second picture and 3

In δabc, if the length of side b is 3 centimeters and the measures of ∠b and ∠c are 45° and 60°, respectively, what is the length of side c to two decimal places?

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)