What is the next number in the sequence -11,-17,-15,-21

-19 is the next number, why?

Because the order goes by -6 up, -2 down.

-11 (-6) -17 (-2) -15 (-6) -21 (-2) -19

Hope this helped!

Plz mark brainliest!

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:

dwe

step-by-step explanation:

ewd