Which number is the additive inverse of -4 1/4 I'm taking a quiz and its timed plz hurry

What is the relationship between all triangles that can be drawn given the same three angles

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?

Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?