Answer:
47°
Step-by-step explanation:
The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles
124° is an exterior angle , thus
77 + ? = 124 ( subtract 77 from both sides )
? = 47°
55. If it says 12 more, you add 12 to 43 to get 55.
Answer:
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➪-263
Step-by-step explanation:
-3x²-20
-3(-9)²-20
-3(81)-20
-243-20
-263
