If Lindsay biked 75 miles in 6 hours, what was her average rate?

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.

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?

|2x - 6| > 10 {x|x < -8 or x > 2} {x|x < -2 or x > 8} {x|-2 < x < 8}