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KatRina [158]
3 years ago
10

HELLLPPP ASAPPP PLSSS

Mathematics
1 answer:
xenn [34]3 years ago
5 0

Answer:

9.) .784 . 10) 0.29

Step-by-step explanation:

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Does Anyone know this?
lukranit [14]

Answer:

∠AEC = 139°

Step-by-step explanation:

Since EC bisects ∠BED then ∠BEC = ∠CED = 4x + 1

∠AED = ∠AEB + ∠BEC + ∠CED = 180 ← straight angle

Substitute values into the equation

11x - 12 + 4x + 1 + 4x + 1 = 180, that is

19x - 10 = 180 ( add 10 to both sides )

19x = 190 ( divide both sides by 19 )

x = 10

Hence

∠AEC = ∠AEB + ∠BEC = 11x - 12 + 4x + 1 = 15x - 11, hence

∠AEC = (15 × 10) - 11 = 150 - 11 = 139°

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Step-by-step explanation:

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Step-by-step explanation:

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