The school provides parking passes that include a letter and a number between 1 and 20. What is the probability that Mr. Welton will be given the parking pass with "W-17" on it? PLZ hurry and help, 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.

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2