Mr. Earl E Bird leaves his house for work at exactly 8:00 am every morning. When he averages 40 miles per hour, he arrives the work place three minutes late. When he averages 60 miles per hour, he arrives three minutes early. a)Suppose his house is x miles from work. Find in terms of x, how long in minutes it takes Earl to get to work when he drives 40 miles per hour. What If he drives 60 miles per hour how long in minutes it will take?
b) At what average speed in miles per hour, should Mr. Bird Drive to arrive at his workplace precisely on time?

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

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As part of an annual fundraiser to raise money for diabetes research, diane joined a bikeathon. the track she biked on was 1,920 yards long. diane biked 38.5 laps. her sponsors agreed to donate an amount of money for each mile she biked. how many miles did she bike? first fill in the blanks on the left side using the ratios shown. then write your answer. given ratios: 5280ft / 1 mi , 1 mi /5280 ft , 1,920 yards / 1 lap , 1 lap / 1,920 yards , 3 ft / 1 yard , 1 yard / 3 ft. blanks: 38.5 laps / 1 yard x (blank) x (blank) x (blank) = (blank) miles i'm really confused on how to do this, and the explanations aren't exactly . if you could walk me through how to do this, it would be greatly appreciated.