lorie76
12.11.2020 •
Mathematics
Austin has ridden 4 miles of a bike course. The course is 40 miles long. What percentage of the course has Austin ridden so far?
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Ответ:
∠MON = 57°
Step-by-step explanation:
∠LOM + ∠MON = ∠LON ← substitute values
3x + 20 + 2x + 33 = 113, that is
5x + 53 = 113 ( subtract 53 from both sides )
5x = 60 ( divide both sides by 5 )
x = 12
Hence
∠MON = 2x + 33 = (2 × 12) + 33 = 24 + 33 = 57°