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Write a system of equations to describe the situation below, solve using elimination, and fill in the blanks.\newlineThere are two trails near Isaiah's house that he runs regularly, a short loop and a long loop. Last week, he ran 22 short loops and 11 long loop, for a total of 1717 kilometers. This week, he ran 55 short loops and 11 long loop, covering a total of 2929 kilometers. What is the length of each loop?\newlineThe short loop has a length of _____ kilometers, and the long loop has a length of _____ kilometers.

Full solution

Q. Write a system of equations to describe the situation below, solve using elimination, and fill in the blanks.\newlineThere are two trails near Isaiah's house that he runs regularly, a short loop and a long loop. Last week, he ran 22 short loops and 11 long loop, for a total of 1717 kilometers. This week, he ran 55 short loops and 11 long loop, covering a total of 2929 kilometers. What is the length of each loop?\newlineThe short loop has a length of _____ kilometers, and the long loop has a length of _____ kilometers.
  1. Define variables: Define the variables for the lengths of the short and long loops.\newlineLet xx be the length of the short loop in kilometers.\newlineLet yy be the length of the long loop in kilometers.
  2. Write equations: Write the system of equations based on the given information.\newlineFirst week: 22 short loops and 11 long loop equal 1717 kilometers.\newlineSecond week: 55 short loops and 11 long loop equal 2929 kilometers.\newlineThis gives us the system of equations:\newline2x+y=172x + y = 17\newline5x+y=295x + y = 29
  3. Eliminate variable: Decide which variable to eliminate.\newlineWe can eliminate yy by subtracting the first equation from the second equation because they both have the same coefficient for yy.
  4. Subtract equations: Subtract the first equation from the second equation to eliminate yy and solve for xx.\newline(5x+y)(2x+y)=2917(5x + y) - (2x + y) = 29 - 17\newline5x+y2xy=29175x + y - 2x - y = 29 - 17\newline3x=123x = 12\newlinex=123x = \frac{12}{3}\newlinex=4x = 4
  5. Substitute value: Substitute the value of xx into one of the original equations to solve for yy. Using the first equation: 2x+y=172x + y = 17 2(4)+y=172(4) + y = 17 8+y=178 + y = 17 y=178y = 17 - 8 y=9y = 9

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