Using the completing-the-square method, rewrite f(x) =x^2+4x-1 in vertex form. this would help a lot thanks!

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.

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Do, h = (7, 9) (14, 18) the scale factor is