Answer:
500 lb
Step-by-step explanation:
Let x lb be the weight of seawater needed to get 17.5 lb of salt.
Now,
x lb - 100%
17.5 lb - 3.5%
Write a proportion:

Cross multiply:

Answer:
This is like quadratic equation you just say y=1x+-2 and then you get the answer
Answer:
$564
Step-by-step explanation:
6% of 600 is 36
So 600-36= $564
The real roots are 3 and -3.
Imaginary roots:-
x - (2 - i) = 0
x = 2 -i is one imaginary root and the other is 2 + i