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chrisraptorofficial
29.07.2019 •
Mathematics
Herbert goes to the bookstore. he buys 2 books that cost $11 each and 4 books that are on clearance for $9 each. he also buys a magazine that costs $8. he believes that $50 will be enough to buy everything.
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Ответ:
Ответ:
Ответ:
-68 = 2(6)(9)cos(m)
cos(m) = -0.6296
m = arcos ( -0.6296)
m = 129.0 degrees