nae9899 nae9899

24-09-2018
Mathematics

contestada

Idek how to start please help

Idek how to start please help class=

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altavistard altavistard

24-09-2018

First, note that x+21 and 3x+9 are "complementary angles;" they add up to 90 degrees. Thus, 4x + 30 = 90 degrees, so that 4x = 60 degrees, and x = 15 degrees.

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