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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

Mathematics
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@e.cociuba
|dw:1364426784027:dw| find the mRF if m angle FNR= 38 degrees
A. 284 degrees B. 142 degrees C. 38 degrees D. 76 degrees @jim_thompson5910 can u help with these two?

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Other answers:

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
so you can use that to find the actual distance x that 3 inches represents on a map
okay for the first one I got B as my answer and the second question I got C
why B for the first one?
you know the distance on the paper map, it's 7 inches it's not z inches
z is the unknown distance in real life from point A to point B that the 7 inches represents on the paper map
oh haha I ment A sorry!
|dw:1364427190413:dw|
i meant to write z miles, not z inches
but hopefully you get the idea
the scale is this |dw:1364427313903:dw|
oh first on is C huh?
put the two side by side to get |dw:1364427383477:dw|
yep so its C!:)
yep, C it is
1 inch/10 miles = 7 inches/z miles or just 1/10 = 7/z
alright how about second one?
we want arc RF, so we need to find central angle FDR
to find the central angle, you use the inscribed angle theorem
this central angle here |dw:1364427601352:dw|
is equal to 2 times any inscribed angle which cuts off the same arc
alright so my answer would be D
yep 76
thanks!
yw

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