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Olenka [21]
3 years ago
11

A car travels 84 miles on 3 gallons of gas

Mathematics
1 answer:
atroni [7]3 years ago
5 0
I'm not sure what is being asked but I did this

Make a proportion:

84/3 = x/1
3x=84
x=28
the car can go 28 miles per gallon hope this helps
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What are the values of a and b?
ivann1987 [24]

Answer:

<h2>a = 400/21, b = 580/21</h2>

Step-by-step explanation:

Small triangles are similar. Therefore, the sides are proportional

\dfrac{a}{20}=\dfrac{20}{21}               <em>cross multiply</em>

21a=(20)(20)       <em>divide both sides by 21</em>

a=\dfrac{400}{21}

For b, we can use the Pythagorean theorem:

b^2=\left(\dfrac{400}{21}\right)^2+20^2\\\\b^2=\dfrac{160000}{441}+400\\\\b^2=\dfrac{160000}{441}+\dfrac{176400}{441}\\\\b^2=\dfrac{336400}{441}\to b=\sqrt{\dfrac{336400}{441}}\\\\b=\dfrac{\sqrt{336400}}{\sqrt{441}}\\\\b=\dfrac{580}{21}

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3 years ago
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Since 24 hours are in a day 24 hours x 21 days is 504 hours

Answer A. is correct


504 hours x 60 minutes per hour is 30240

Answer B. is correct. These are all the correct answers, A,B, and D.



3 0
3 years ago
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linda earns $90,000 per year. if she does not work for 2 months in a year, how much money would she earn?
Llana [10]
She would earn 75,000 if she did not work for two months out the year.
8 0
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Which value of x is in the solution set of the following inequality. -3x +5 &gt;7
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4 0
4 years ago
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