A. -3/2
b. 0
c. 3/2
d. DNE

Step-by-step explanation:

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d

because parallelagram have all 4 angels the same size dependeing and a rectangle and square are oth parallelogram

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)