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katlin95

  • 3 years ago

On a map, the key states that 1 inch equals 10 miles. If you want to calculate how many miles is equivalent to 7 inches, which proportion would you use? A.the fraction 10 inch over 1 miles equals the fraction 7 inches over z miles B. the fraction 1 inch over 10 miles equals the fraction z inches over 7 miles C. the fraction 1 inch over 10 miles equals the fraction 7 inches over z miles D. the fraction z inch over 10 miles equals the fraction 7 inches over 1 miles

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  1. katlin95
    • 3 years ago
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    @e.cociuba

  2. katlin95
    • 3 years ago
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    |dw:1364426784027:dw| find the mRF if m angle FNR= 38 degrees

  3. katlin95
    • 3 years ago
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    A. 284 degrees B. 142 degrees C. 38 degrees D. 76 degrees @jim_thompson5910 can u help with these two?

  4. jim_thompson5910
    • 3 years ago
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    Similar example: if 1 inch = 50 miles then 3 inches on a map would mean... 1 inch/50 miles = 3 inches/x miles or just 1/50 = 3/x

  5. jim_thompson5910
    • 3 years ago
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    so you can use that to find the actual distance x that 3 inches represents on a map

  6. katlin95
    • 3 years ago
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    okay for the first one I got B as my answer and the second question I got C

  7. jim_thompson5910
    • 3 years ago
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    why B for the first one?

  8. jim_thompson5910
    • 3 years ago
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    you know the distance on the paper map, it's 7 inches it's not z inches

  9. jim_thompson5910
    • 3 years ago
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    z is the unknown distance in real life from point A to point B that the 7 inches represents on the paper map

  10. katlin95
    • 3 years ago
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    oh haha I ment A sorry!

  11. jim_thompson5910
    • 3 years ago
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    |dw:1364427190413:dw|

  12. jim_thompson5910
    • 3 years ago
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    i meant to write z miles, not z inches

  13. jim_thompson5910
    • 3 years ago
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    but hopefully you get the idea

  14. jim_thompson5910
    • 3 years ago
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    the scale is this |dw:1364427313903:dw|

  15. katlin95
    • 3 years ago
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    oh first on is C huh?

  16. jim_thompson5910
    • 3 years ago
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    put the two side by side to get |dw:1364427383477:dw|

  17. katlin95
    • 3 years ago
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    yep so its C!:)

  18. jim_thompson5910
    • 3 years ago
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    yep, C it is

  19. jim_thompson5910
    • 3 years ago
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    1 inch/10 miles = 7 inches/z miles or just 1/10 = 7/z

  20. katlin95
    • 3 years ago
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    alright how about second one?

  21. jim_thompson5910
    • 3 years ago
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    we want arc RF, so we need to find central angle FDR

  22. jim_thompson5910
    • 3 years ago
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    to find the central angle, you use the inscribed angle theorem

  23. jim_thompson5910
    • 3 years ago
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    this central angle here |dw:1364427601352:dw|

  24. jim_thompson5910
    • 3 years ago
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    is equal to 2 times any inscribed angle which cuts off the same arc

  25. katlin95
    • 3 years ago
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    alright so my answer would be D

  26. jim_thompson5910
    • 3 years ago
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    yep 76

  27. katlin95
    • 3 years ago
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    thanks!

  28. jim_thompson5910
    • 3 years ago
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    yw

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