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Elan Coil [88]
3 years ago
12

Hi could someone just help me with this I'm not sure if i'm doing it correctly.

Mathematics
1 answer:
salantis [7]3 years ago
4 0
Two angles are supplementary when they <span>add up to 180 degrees </span>⇒
m∠1 + m∠2 = 180°
4y + 7 + 9y + 4 = 180
13y + 11 = 180
13y = 180 - 11
13y = 169
y = 169/13
y = 13

m∠2 = 9y + 4 = 9 * 13 + 4 = 121°
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3 years ago
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