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8. In a given training week, a swimmer completes 1/4 mile on day one, 2/5 mile on day two, and 3/7 mile on day three. How many total miles does the athlete swim in the given week? 9. Select the simplified expression for 8(x-6)-6(x-1) +9x. 10. The temperature on one day in January for Phoenix,AZ, is 52 degrees Fahrenheit.On the same day in Barrow, AK, the temperature is - 17 degrees Fahrenheit. What is the difference between these two temperatures? 11. Solve 8x+6=1.