Answer:

Step-by-step explanation:
1) The other curve is
then the common points of both curves are x-intercepts, the roots of 

2). Then those intersection points are the upper and the lower limits. Plugging in to this formula for they belong to the interval [-1,1]:


12x^2y^2+2xy-2 with problems like these use the app “Photomath” it will help you a lot.
Step-by-step explanation:
a. x = 30° (180-70-80)
b. <FGA = 80°
c. vertical angles