Answer:

Step-by-step explanation:
x² = 19x + 12
⇔ x² - 19x - 12 = 0
Calculating the discriminant :
b² - 4ac = (-19)² - 4×1×(-12) = 409
The discriminant is positive ,then the equation has two solutions.

Answer:
It is an obtuse angle!
Step-by-step explanation:
I think that the answer for that one is A
Y= -1x + -1 is the answer