A computer store buys a computer system at a cost of $614.60. The selling price was set at $878 , but after a year the computer did not sell. The store that advertises a 30% markdown on the $878 computer system. Find the sale price.

Step-by-step explanation:

30% is $100 so $878-$100 =$778

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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