You travel from point A to point B in a car moving at a constant speed of 70 km/h. Then you travel the same distance from point B to another point C, moving at a constant speed of 90 km/h. Is your average speed for the entire trip from A to C equal to 80 km/h? Explain why or why not.

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

that would be because of both gravity and friction. so     c

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;