A train leaves the train station at 1 pm. It travels at a speed of 60 mph. Another train leaves the same station an hour later and goes the same direction at a speed of 80 mph. In how many hours will the second train catch up with the first train?

(hurry! ) which expression is equivalent to the following complex fraction?

In two or more complete sentences, formulate how to use technology to calculate the appropriate regression model for the given data. you are not required to find the model, just choose the appropriate regression and explain how to use the technology. (-5,,2.,0.8), (0,-0.5), (2,-1.3), (3,-0.8), (5,2)

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?