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UNO [17]
3 years ago
14

Alex lives 3/10 of a mile from his school. If he walks to and from school each day how far will he walk in a week?

Mathematics
1 answer:
Lina20 [59]3 years ago
4 0
He would walk 3/10 x7 so that would be 21/10 simplify that will be 2 1/10
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pychu [463]

The speed of the airplane is the ratio of the distance to the time

The initial average speed of the airplane is approximately 110.8 mph

Reason:

Given parameters are;

The distance between Portland Oregon and Seattle Washington = 145 miles

The decrease in travel time when the speed is increase by 20 mph =  minutes

The initial speed of the airplane, v = Required;

Solution;

t = \dfrac{145}{v}

t - \dfrac{12}{60}  = \dfrac{145}{v + 20}

Therefore;

\dfrac{145}{v} - \dfrac{12}{60}  = \dfrac{145}{v + 20}

Which gives;

\dfrac{145}{v + 20} - \dfrac{145}{v} + \dfrac{12}{60} = 0

Therefore

0.2·v² + 4·v - 2,900 = 0

v ≈ ±110.8 mph

The initial average speed of the airplane, v≈ ± 110.8 mph

Learn more  here:

brainly.com/question/11365874

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2 years ago
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Answer:

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Step-by-step explanation:

8 0
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What are the formulas for total surface area of 3D shapes ?
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Find the measure of each missing angle explain work
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Rewrite 2tan3x in terms of tanx
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