Suppose the alphabet consists of 14, b, c, d, e, f} (a) how many 4-letter strings do not contain the word "bed"? (b) how many 4-letter strings have "f" in the first position or "e" in the last position, but not both? (c) how many 7-letter strings contain the word "bead"? (d) how many 4-letter strings either begin with "c" or end with two vowels?

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:

a

step-by-step explanation:

the answer is a

28

step-by-step explanation:

because that's the answer