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Semmy [17]
3 years ago
7

Alysha’s average speed when walking home from the market was 5 mph, and it takes her 21 minutes longer than when she drives to t

he market. If she drives along the same route, at an average speed that is 8 times her average walking speed, how many minutes does it take her to drive home from the market?
Mathematics
1 answer:
Delicious77 [7]3 years ago
3 0

9514 1404 393

Answer:

  3 minutes

Step-by-step explanation:

Let x represent Alysha's time to drive home from the market.

Speed and time are inversely proportional to each other (for the same distance), so we have ...

  (walking speed)(walking time) = (driving speed)(driving time)

  5(x +21) = (8·5)(x)

  x +21 = 8x . . . . . . . . . divide by 5

  21 = 7x . . . . . . . . subtract x

  3 = x . . . . . . .divide by 7

It takes Alysha 3 minutes to drive home from the market.

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That can simplify as well. Now it's 14/6 which is equivalent to the fraction we had before. But it can also go down to 2 2/6. Now we can simplify it even further. By dividing it by two we can get 2 1/3. These are the measurements we need. So you would need how many thirds? Seven. (2 1/3 is seven thirds) This is your final answer.

You would need to have seven peices of wrapping paper cut to wrap both gift boxes.
6 0
3 years ago
Ed and Greg are working on their math homework. Ed says (2.0) is a solution to y < 4x - 8. Greg disagrees and says (2,0) is n
Tom [10]

Answer:

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Step-by-step explanation:

5 0
3 years ago
A strip mall generates $215,000 in effective rental income and $3,000 in other income. The same mall has $102,000 in operating e
Gnesinka [82]

Answer: $116,000

Step-by-step explanation:

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Expenses incurred;

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6 0
3 years ago
Dorothy types 120 words per minute. How many words does Dorothy type in 1.75 minutes?
nirvana33 [79]
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Hope this helps :)  
8 0
3 years ago
Read 2 more answers
What is the graph of y = [x] - 2?
FromTheMoon [43]

Answer:

Find a x-inercept, subtract that by two, and that's your y intercept.

example; x= 5

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cordinates ; (5, 3)

Hope this helped! PLease mark as brainliest! Thanks!

Step-by-step explanation:

3 0
2 years ago
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