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Vitek1552 [10]
3 years ago
14

Seven days ago, the gas tank on Rosa's car was filled with 20 gallons of gasoline. Today there are 6 gallons of gasoline. a. Wha

t integer represents the change of gasoline in the past seven days? b. What is the mean change in gasoline in gallons per day? c. What is the fuel efficiency, in miles per gallon, of Rosa's car if she drove 490 miles in the past seven days?
Mathematics
1 answer:
Galina-37 [17]3 years ago
6 0

<em>Answer:</em>

<em>Answer: -14 gallons. Given : Seven days ago, the gas tank on Roses car was filled with 20 gallons of gasoline. Today there are 6 gallons of gasoline. ∵ 20> 6 , it means there is decrease in the amount gasoline.</em>

<em>Step-by-step explanation:</em>

<em>Your welcome :)</em>

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8. The length of the support is 7. 9 m

9. The length of the conveyer is 12m

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<h3>How to solve the trigonometry</h3>

8. We have the angle to be 20 degrees

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3. To determine the sides and angles, we use the sine rule;

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For side a, we use the Pythagorean theorem

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Learn more about trigonometric identity here:

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