maualca
31.12.2019 •
Mathematics
Atower casts a 30-foot shadow. at the same time, a person who is 6 feet 6 inches tall casts a 4-foot shadow. how tall is the tower?
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Ответ:
C
Step-by-step explanation:
f(x).g(x) is
(x+12).(x-5)=x^2-5x+12x-60(add like terms)
=x^2+7x-60, the answer is C