Atrain travels 51 kilometers in 1 hours, and then 72 kilometers in 5 hours. what is its average speed?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

Write a polynomial function with the given zeros x= -1,0,2show your work