3x + 7y = 1 or x2 − y2 = z3

4. find the geometric mean of 4 and 12. 24 8

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

What is the measure of angle tvu shown in the diagram below