Todd's restaurant bill for dinner was $15.55. With the tip included, he spend a total of $18.00 How much did
Todd leave for a tip? Write an equation to represent
the problem and give your answer.

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Find the coordinates of point x that lies along the directed line segment from y(-8, 8) to t(-15, -13) and partitions the segment in the ratio of 5: 2.

Which two undefined geometric terms always describe figures with no beginning or end?