a warehouse has 3 shelves long enough to hold 6 boxes and high enough to hold 4 boxes. All the shelves are full. There are blank boxes on the shelves in all.

30 boxes

Step-by-step explanation:

if there are 3 shelves that hold 6 boxes do 6*3=18

and if the 3 shelves are tall enough to hold 4 do 3*4=12 and then add 18+12=30

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

source:

sorry, i can't understand your question. will later if you describe more clearly!

: )