Katrina is decorating her room with three posters of her favorite bands. Each
measures 18 inches in width. Poster 2 is horizontally centered on her wall, as show
below.
1.5 in
18 in
1.5 in
Poster 3
DAO
Poster 2
Poster 1
7.5 ft
Visual not drawn to scale
What is the distance, in inches, between the left edge of the wall and Poster 1?
A.
16.5
B. 18
C. 28.5
D. 33

1 3 5

step-by-step explanation:

i took the test: )

here is a big fat

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.