Answer:
7/9 = 42/n.
7n = 378,
n = 54.
Step-by-step explanation:
-11
Triangle ABC
SO,
AB = AC +BC
x + 8 = 2x -5 + (BD + DC)
x + 8 = 2x-5 + 10 +14
x + 8 = 2x + 19
2x - x = -19 + 8
x = -11
x=41
9²+40²=x²
81+1600=x²
1681=x²
√1681=√x²
41=x
15000
