Answer:
Step-by-step explanation:
plug 3 into x
2(3)^2+(3)
2(9)+3
18+3
21
f(3)=21
Answer: The Answer is A
Step-by-step explanation:
i think it's right
A, C, and E.
you can check them by putting into y=mx+b form. if m is negative then as domain increases range decreases.
Answer: 3 : 2
Step-by-step explanation:
Let A represents the total population of country A and B represents the total population of country B.
According to the question,

⇒ 



⇒ 
But, Again according to the question,
The total population that claims that they are from A = one half of the total population of A and B.
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 