The train travels at an average speed of 68 miles per hour for the first 2 hours and at an average speed of 80 miles per hour for the next 4 hours. what was the train's average speed for the 6 hour trip?

Astudent simplified a rational expression as shown.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Sample response: if the graph passes the horizontaline test, then the function is one to one. functions that are one to one have inverses that a therefore, the inverse is a hinction compare your response to the sample response above. what did you include in your explanation? a reference to the horizontal-line test d a statement that the function is one-to-one the conclusion that the inverse is a function done