1qteg
28.10.2019 •
Mathematics
Kim is reading a book with 380 pages. she read 20 pages each day until she reached part 2 of the book. part 2 of the book is 160 pages long. she uses the equation 380−20d=160 to represent the number of days, d, it took her to read part 1. how many days did it take kim to read part 1 of the book?
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Ответ:
It took her 11 days to read Part 1 of the book.
Step-by-step explanation:
380 - 20d = 160
Subtract 380 from each side
-20d = -220
Divide each side by -20
d = 11
Ответ:
a is a factor of a and a2
only 10ab has b, so b is not a factor
hence the answer is 2a