How many different triangles can be constructed with three angles, each measuring 60°? one , more than one or none

In trapezoid efgh, m∠gfe=63∘. identify m∠ghe. !

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

Alex took his brother to a birthday party. the party was scheduled to last for 1 and 3/4 hours but they stayed for 4/5 of an hour more. how long did she stay at the party?