Solve the equation

So we have:

Factor, 2 numbers of which the sum is -13 and multiplying gives 36, these two are -4 and -9
So solve:

The solutions:
4 and 9
Answer:
a = 60
Step-by-step explanation:
90 + 30 = 120
120 - 180 = 60
Answer:
Step-by-step explanation:
6=48
Tangent is opposite/adjacent so it would 60/25 which simplifies to 12/5