Determine the equation of the line in slope y-intercept form that is perpendicular to the line 5x +15y-21=0 and has the same x-intercept as the line 4x - 5y +60 =0

3x-y+45=0

Step-by-step explanation:

you can refer to the photo I attached

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:

i'm sorry i don't know

step-by-step explanation: