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Step-by-step explanation:

Parallel lines have same slope

19) y = x - 4

m = 1 ;   (2, 3 )

Equation: y - y₁ = m(x- x₁)

             y - 3 = 1(x - 2)

              y - 3 = x -2

                   y = x - 2 + 3

y = x + 1

20) 2x + 3y = 3

We have to write in y = mx + b  form

3y =  - 2x - 3

; (-6, -1)

for perpendicular lines, m2 = -1/m1

21) y = 2x+ 5

m1 = 2

;     (-2,8)

22) x+ 4y = 8

           4y = -x + 8

m2 = 4;  (-2,-11)

y - [-11] = 4(x -[-2])

y + 11 = 4 (x + 2)

y + 11 = 4x + 8

      y = 4x + 8 - 11

      y = 4x - 3

b.-4 units

all you   do is count how many times you move

∠cbe and ∠deb are same-side interior angles.

i took the test