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Crazy boy [7]
3 years ago
8

Ed is on a road trip. He has already traveled 238 miles and is driving at a rate of 68 miles per hour. Which equation could be u

sed to find how many hours, x, Ed has left in his road trip if he is traveling 615 total miles?
Mathematics
2 answers:
Dmitry_Shevchenko [17]3 years ago
6 0

Answer:

x = (615 - 238) / 68

Step-by-step explanation:

Serga [27]3 years ago
6 0

Answer:

615 = 68x + 238

Step-by-step explanation:

You have to set the equation equal total miles and to find the time you multiply the amount of remaining hours (x) by the miles per hour and then add the miles already traveled. To find the value of x do simple algebra and isolate x on one side of the equation by subtracting 238 from both sides and then dividing both sides by 68.

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Distributive property of 224÷7
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224 
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=1/7 (224) 

=1/7(210 + 14)

=210        14
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   7              7

= 32 






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A city with a population of 300000 is growing at a rate of 2% per year. What will it be in 20 years.
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Is over of = percent over 100
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What is the value for y? Explain please
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BARSIC [14]

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5 0
4 years ago
Derek and Mia place two green marbles and one yellow marble in a bag. Somebody picks a marble out of the bag without looking and
cluponka [151]

Answer:

Thus, the expected value of points for Derek and Mia are \dfrac{-1}{9} and \dfrac{1}{9} respectively.

Step-by-step explanation:

Number of green marbles = 2 and Number of Yellow marbles = 1

Then, total number of marbles = 2+1 = 3

A person selects two marbles one after another after replacing them.

So, the probabilities of selecting different combinations of colors are,

1.\ P(GG)=P(G)\times P(G)\\\\P(GG)=\dfrac{2}{3}\times \dfrac{2}{3}\\\\P(GG)=\dfrac{4}{9}

2.\ P(GY)=P(G)\times P(Y)\\\\P(GY)=\dfrac{2}{3}\times \dfrac{1}{3}\\\\P(GY)=\dfrac{2}{9}

3.\ P(YG)=P(Y)\times P(G)\\\\P(YG)=\dfrac{1}{3}\times \dfrac{2}{3}\\\\P(YG)=\dfrac{2}{9}

4.\ P(YY)=P(Y)\times P(Y)\\\\P(YY)=\dfrac{1}{3}\times \dfrac{1}{3}\\\\P(YY)=\dfrac{1}{9}

Now, we have that,

If two marbles are of same color, then Mia gains 1 point and Derek loses 1 point.

If two marbles are of different color, then Derek gains 1 point and Mia loses 1 point.

<h3>Also, the expected value of a random variable X is E(X)=\sum_{i=1}^{n} x_i\times P(x_i).</h3>

Then, the expected value of points for Derek is,

E(D)= (-1)\times \dfrac{4}{9}+1\times \dfrac{2}{9}+1\times \dfrac{2}{9}+(-1)\times \dfrac{1}{9}\\\\E(D)= \dfrac{-5}{9}+\dfrac{4}{9}\\\\E(D)=\dfrac{-1}{9}

And the expected value of points for Mia is,

E(M)= 1\times \dfrac{4}{9}+(-1)\times \dfrac{2}{9}+(-1)\times \dfrac{2}{9}+1\times \dfrac{1}{9}\\\\E(M)= \dfrac{5}{9}-\dfrac{4}{9}\\\\E(M)=\dfrac{1}{9}.

Thus, the expected value of points for Derek and Mia are \dfrac{-1}{9} and \dfrac{1}{9} respectively.

8 0
3 years ago
Read 2 more answers
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