, 24.01.2020marquion

# Find mdec a) 90 b) 95 c) 100d) 120​  genyjoannerubiera

step-by-step explanation:  kortetsosie4576

no one knows lol

step-by-step explanation: angelashaw449

C) 100

Step-by-step explanation:

line AC intersects line DB,

hence ∠AEB and ∠DEC are opposite angles and thus

∠AEB = ∠DEC

5x-10 = 4x+12   (subtract 4x from both sides)

5x - 4x - 10 = 12

x - 10 = 12    (add 10 to both sides)

x = 12 + 10 = 22 degrees

∠DEC = 4x+12

= 4(22) + 12

= 88 + 12

= 100 degrees  ### Other questions on the subject: Mathematics Mathematics, 21.06.2019, ecarter8967
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