Bellringers

October 1: John drove for 3 hours at a rate of 50 miles per hour and for 2 hours at 60 miles per hour. What was his average speed for the whole journey?

October 2: John drove for 5 hours at a rate of 45 miles per hour and for 2 hours at 60 miles per hour. What was his average speed(round to nearest mph) for the whole journey?

October 3:
 * It took John 5 hours to drive to the mountainsand it took him 4 and a half on the way back. If it is about 300 miles to the mountains, what was his average speed(round to nearest mph) for the whole journey?
 * If the grading scale is:
 * Test: 50%
 * Quiz: 35%
 * Homework: 15%
 * What would you make if you have a 70 average on test, 68 average on quizzes, and a 95 average on homework?