Need now! solve for x.
a. 7
b. 1
c. 9
d. 12

the value of x is 9

Step-by-step explanation:

Tangent chord angle = half of intercepted arc

4x+19 = half of minor arc DE

Multiply by 2 on both sides

minor arc DE= 2(4x+19)= 8x + 38

sum of angle in a circle is 360 degree

minor arc DE + major arc DE = 360

Subtract 36 from both sides

Divide both sides by 36

x=9

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: