At a sale, Ricardo bought 24 reams of paper and 4 ink cartridges for $320. Brittany bought 2 reams of paper and 1 ink cartridge for $50. The reams of paper were all the same price and all the ink
cartridges were the same price. Write a system of equations to represent the situation. Then find
the price of a ream of paper and an ink cartridge.

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:

the answer is y = 11.54

hope this : )