Joe drove at the speed of 45 miles per hour for a certain distance. he then drove at the speed of 55 miles per hour for the same distance. what is the average speed for the whole trip?

Explanation:

Let the distance moved by Joe is "d"

so the time taken by him to drove it by speed 45 mph is given as

now the same distance is traveled by him with speed 55 mph

so the time taken by him

so total time taken by him for complete distance 2d

now the average speed is given as

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods