I need the encrypted message in this matrix​. also the alphabetical key

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A = [ -1, 2, -3, 4]

B = [ -2, 3, -2, 4]

C = [ 3, -4, -2, 4]

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is