A car was initially traveling at an average speed of 48 miles per hour. During each of ten successive 10-minute intervals, the car decreased its average speed by 4 miles per hour.
How many miles did the car travel in the seventh 10-minute interval?

A) 2 B) 3 C) 4 D) 5 E) 6

4 miles

Step-by-step explanation:

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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