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natima [27]
4 years ago
6

PLZZ HELP MEE I NEED HELP

Mathematics
1 answer:
MaRussiya [10]4 years ago
6 0

Answer:

D. 97°

Step-by-step explanation:

Step 1:

2y + 3° + 9y - 7° + 7y + 4° = 180°  Sum of Δ

Step 2:

18y = 180°   Algebra

Step 3:

y = 10       Algebra

Step 4:

2 ( 10 ) + 3 = 23°    Algebra

Step 5:

9 ( 10 ) - 7 = 83°   Algebra

Step 6:

7 ( 10 ) + 4 = 74°   Algebra

Answer:

D. 97°

Hope This Helps :)

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