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keke6361
16.11.2020 •
Mathematics
Twenty students were surveyed about virtual and face-to-face classes. Twelve of them perferred face-to-face classes over virtual classes. What is a reasonable answer to how many would like face - to- face if 360 students were asked. Show your work !!!
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Ответ:
Ans 35 percent
Step-by-step explanation:
Ответ:
Question (2a):
Given that sum of triangle = 180°
∠1 + ∠2 + ∠3 = 180°
∠3 = 180° - ∠1 - ∠2 (1)
Given that sum of angles on the adjacent line = 180°
∠3 + ∠4 = 180°
∠4 = 180° - ∠3 (2)
Sub (1) into (2)
∠4 = 180° - (180° - ∠1 - ∠2 )
∠4 = 180° - 180° + ∠1 +∠2
∠4 = ∠1 +∠2 (proven)
Question (2b):
∠4 = 52° + 25°
∠4 = 77°