Alrighty
remember

means

and

and

for all real values of x
so

means

means

which simplifies to
1=x²+4x-5
minus 1 both sides
0=x²+4x-6
use quadratic formula or complete the square

and

2 solutions
P(C/Y) = 15/30 = 1/2 = 0.5
Answer:
what do u mean slope line?
Step-by-step explanation:
pls be more specific
If i understand your question correctly, the answer is 172 years.