It takes 2 hours to travel 30 miles by bike. how long will it take to travel 105 miles?

Solve the system of equations. y= 2x y= x^2 - 15

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.

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?