Algebra

What is the number of degrees in the measure of the larger of two supplementary angles if the ratio of their measures is 4:5?

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  1. 4x + 5x = 180
    9x = 180
    x = 20
    substituting,
    4x = 4*20 = 80 degrees
    5x = 5*20 = 100 degrees

    hope this helps~ :)

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