A librarian surveyed her reading club. Of those surveyed, 7 favored mysteries, 4 favored fantasy, 3 favored science fiction, and 6 favored adventure. Based on these results, predict how many of the 520 students do not favor mysteries.

338 out of 520

step by step:

13 out of 20 dont favor mystery

13:20

? :520

520÷20=26

13×26= 338

338 students out of 520 do not favor mysteries

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

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