Question

If 3+ 4i is a root of the equation x' + px + 9 = 0, then​

Answer 1

Answer:

x is equal to 56

hope it helps you

Answer 2

$\small{\color{red}{\fbox{\textsf{\textbf{Answer}}}}}$

Let the age of father be x years

Let the age of one of his children be y years and age of other children be z years

From given information,

x=2×(y+z)...(1)

After 20 years,

(x+20)=(y+20)+(z+20)...(2)

Substituting value of (1) in (2), we get

2×(y+z) +20=y+z+40

2y+2z−y−z=40−20

y+z=20...(3)

Substituting value of (3) in (1), we get

x=2×(20)

⇒x=40

No, as you said earlier, "responsibility" is singualr, so the person holding that position has only one responsibility or whatever he does is considered as one concept, responsibility, but "responsibilities" is plural and the person has more than one responsibility.