Marie mixes 20 liters of 12% acid solution with a 36% acid solution to make a 20% acid solution. how many liters of 36% solution did she use? 10 liters 12 liters 13.7 liters 16 liters

First Option

10 liters

Step-by-step explanation:

Let's call x the quantity in liters of the acid solution at 12%

Let's call z the amount in liters of the acid solution at 36%

Then the amount of acid in the solution will be:

We know that x = 20 liters, then we substitute x = 20 in the equation solve the equation for z

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|