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Please help anybody I need to fast please

Please help anybody I need to fast please-example-1

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answer:
D. t = -1

Explanation:
that side should be 180 degrees and the whole is 360 but we are only measuring half
so (20t + 5) = 15t
-20t -20t
5 = -5t
/-5 /-5
-1 = t
User Garrett Rowe
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