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Brut [27]
3 years ago
10

In the circle above, Line EF and CD intersect at G. Determine the measure of arc DE.

Mathematics
1 answer:
Aliun [14]3 years ago
6 0

Answer:

100

Step-by-step explanation:

It is a rule that for two opposite arcs, with intersecting lines, between them, the average of the arcs is equivalent to the inside angle. Given this, we can say that:

(CF + ED)/2 = angle G

plug values in

(12x+9x+10)/2 = 110

multiply both sides by 2

21x + 10 = 220

subtract 10 from both sides

21x = 210

divide both sides by 21

x=10

Plug this into DE

10*9+10 = 100

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it could also be a word explanation

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13

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count A up to C

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3 years ago
Why is it important to be able to decide if an item is a NEED or a WANT?
andreyandreev [35.5K]

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d

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6 0
2 years ago
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I know for a fact B is wrong, so you can mark that off. I got C.
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A motorboat takes 5 hours to travel 200 miles going upstream. The return trip takes 4 hours going downstream. What is the rate o
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Answer:

rate of motorboat: b

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Step-by-step explanation:

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Hope this helps :)

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