Answer:
29
Step-by-step explanation:
<4 ≅ <1, 3 <≅ 2 Corresponding angles postulate
ΔACE ≈ ΔBCD Angle angle similarity postulate
(CB + BA)/CB = (CD + DE)/CD Substitution property of equality
I would say B-C
(3, 17) and (5,23)
23-17= 6
5-3=2
y-17=m(3-x)
m=3