Liz Denisova, Private Math and Physics Tutor

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(224) 715-1613

Math and Physics Tutor for High School and College Students in Libertyville, Lake Forest IL, Vernon Hills, etc., and online

I primarily work with students in the following suburbs of Chicago:

  • Libertyville,

  • Vernon Hills,

  • Mundelein,

  • Lake Forest,

  • Lake Bluff, etc.

Honor's Geometry: Reflections Problem 13.5 #17: Libertyville

Here is the solution. The slope of the "fourth" line is -3/2, so the 2.5 as the y-coordinate of R is not an estimate from the diagram, but actually can be calculated algebraically by writing an equation of that line using two points, and then substituting x=9. But I think in this case it's sufficient to "figure it out" based on slope.

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