4. An obtuse triangle with angles measuring 45°, 89°, and 46° Possible or impossible

and why?

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Which function has the domain x> -11?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.