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Okie, hope you a new year!
Answer:
Books remaining in Andrews book collection = 29 books
Explanation:
Andrews book collection contains 60 books.
He donates 15% of his books to the national library,
Number of books to library = 60 x 15/100 = 9
Sells 1/4 of his books to a book dealer,
Book sold to book dealer = 60 x 1/4 = 15
Sells 7 books on amazon.
Books remaining = 60 - (9 + 15 + 7)
= 60 - 31
= 29
Books remaining in Andrews book collection = 29 books
Answer:
10.5
Step-by-step explanation:
ΔXYZ is similar to ΔABC. So the corresponding sides are proportional:
XY / AB = XZ / AC = YZ / BC
We want to find length AB, so we can either use the first proportion:
7 / k = 3 / 4.5
Or we can use the second proportion:
7 / k = 6 / 9
Either way, we'll get the same answer. I'll use the second proportion. Cross multiplying:
6k = 63
Dividing:
k = 10.5