Jesse and Amir were assigned the same book to read. Jesse started reading on Saturday, and he is reading 30 pages a day. Amir didn't start until Sunday, but he is reading 35 pages a day.

How many days will it take Amir to catch up to Jesse, and how many pages will they each have read?

Answer the questions to solve this problem using a system of equations.

1. Write an equation to represent the number of pages Amir has read. Use x to represent the number of days Amir has been reading and y to represent the number of pages he has read.


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2. Write an equation to represent the number of pages Jesse has read.

Using x, the number of days Amir has been reading, write an expression to represent the number of days Jesse has been reading. Remember that Jesse started reading one day before Amir. Use this expression to write an equation for the number of pages Jesse has read. Let y represent the number of pages read.


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3. Write the system of equations using your answers from questions 1 and 2.


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4. You will use substitution to solve this system. Which variable will you substitute for and why? Show the equation that results from the substitution.


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5. Solve the system of equations. Show your work.


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6. Interpret your solution. How many days does it take Amir to catch Jesse? At that time, how many pages have they read?


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Respuesta :

9514 1404 393

Answer:

  • 6 days
  • 210 pages

Step-by-step explanation:

1. The number of pages (y) Amir reads in x days is ...

  y = 35x

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2. Jessie has been reading 1 more day than Amir, so an expression for the number of days Jessie has been reading is ...

  x +1

The number of pages Jessie has read is ...

  y = 30(x +1)

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3. The system of equations is the two of these equations written together:

  • y = 35x
  • y = 30(x +1)

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4. Using substitution to solve this, we find it convenient to substitute for y. Either equation provides an expression for y that can be substituted into the other equation. After substitution, the equation looks like ...

  35x = 30(x +1)

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5. We can subtract 30x from both sides and divide by 5 to solve.

  35x -30x = 30(x +1) -30x

  5x = 30x +30 -30x

  5x = 30 . . . . simplified form after subtracting 30

  x = 6 . . . . . . .result of dividing both sides by 5

  y = 35x = 35·6 = 210

  (x, y) = (6, 210)

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6. It takes Amir 6 days to catch Jessie. At that time, both will have read 210 pages.

Answer:

This is right. Thank you