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22-11-2020
Mathematics

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What is the value of z? Please provide an explanation, thanks!

What is the value of z Please provide an explanation thanks class=

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Аноним Аноним

22-11-2020

Answer:

z=7

Step-by-step explanation:

72°+(8z-8)°+(9z-3)°=180° (a triangle contains 180° and vertical angles are equal)

(8z-8)°+(9z-3)°=180°-72°

17z°-11°=108°

17z°=108°+11°

17z°=119°

z°=119°/17°

z°=7°

z=7

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