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21 September, 10:07

the interor angles of a triangle have measures 100 degrees 4y+25 degrees and 3y+20 degrees whats the value of y

+5
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  1. 21 September, 10:48
    0
    y = 5

    Step-by-step explanation:

    The 3 interior angles of a triangle sum to 180°

    Sum the 3 given angles and equate to 180

    100 + 4y + 25 + 3y + 20 = 180 ← simplify left side

    7y + 145 = 180 (subtract 145 from both sides)

    7y = 35 (divide both sides by 7)

    y = 5
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