How much water must be added to a gallon of 10% saline solution to create a 2% solution

We are given that some water is added to  a gallon of 10% saline to create 2% solution.

Let us assume x gallons of water is added in 10% of a gallon of saline.

Therefore,

10% of 1 gallon = 2 % of (solutions of x gallons of water + saline).

0.1 = 0.02 (x+1)

0.1 = 0.02x +0.02

Subtracting 0.02 from both sides, we get

0.1 -0.02= 0.02x +0.02 -0.02

0.08 = 0.02x

Dividing both sides by 0.02, we get

0.08/0.02 = 0.02x/0.02

coin flip

non-answer:

choosing

sorry if this isnt what you're looking for i dont really understand the question

a

step-by-step explanation:

when a number is between two straight lines it means the absolute value.

to find absolute value you need to know how many numbers is that number away from 0.

when finding absolute value the number will always come out positive

so absolute value of -3 is 3

absolute value of 3/2 is 3/2

absolute value of -2 is 2

absolute value of 3.5 is 3.5

absolute value of -1 is 1

now put these numbers in order:

a)   |-1|, |3/2|, |-2|, |-3|, |3.5|