Line P is parallel to line q. Which proof explains why the sum of the interior angles of the triangle must be 180?

Which system of linear inequalities is represented by the graph?

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent

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?