60 degrees,
explanation-
equilateral triangle
Yes. Here is a pdf if you need more info
http://www.emsisd.com/cms/lib/TX21000533/Centricity/ModuleInstance/5507/6.5C_Reading-Compounds_Have_...
Answer:
x=7
Step-by-step explanation:
3^(x-5)=9
3^(x-5)=3^2
x-5=2
x=7