The algebraic expression x/5 can be used to calculate the distance in miles that you are from a flash of lightning, where x is the number of seconds between the time you see a flash of lightning and the time you hear the thunder. calculate the distance that you are from the flash of lightning if you hear the thunder 2 seconds after you see the lightning

In this case x=2.

Plugging this into the expression gives us 2/5 miles from the flash of lightning.

2/5 = .4 miles

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:

goog may have it for you