【摘 要】
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1. Tom is driving a jeep at a constant speed of 55 MPH. A sports car one-half miles behind Tom is moving at a constant speed, it passes Tom in 60 seconds. How
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1. Tom is driving a jeep at a constant speed of 55 MPH. A sports car one-half miles behind Tom is moving at a constant speed, it passes Tom in 60 seconds. How many miles per hour is the speed of the sports car? 2. What is the value of the sum 2~(-1)+2~(-2)+2~(-3)+…+2~(-9)+2~(-10)? Express your answer as a common fraction. 3. The average of twelve different positive integers is 12. What is the greatest possible value of any one of these numbers?
1. Tom is driving a jeep at a constant speed of 55 MPH. A sports car one-half miles behind Tom is moving at a constant speed, it passes Tom in 60 seconds. How many miles per hour is the speed of the sports car 2. What is the value of the sum 2~(-1)+2~(-2)+2~(-3)+...+2~(-9)+2~(-10)? Express your answer As a common fraction. 3. The average of twelve different positive integers is 12. What is the greatest possible value of any one of these numbers?
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