Someone please help me with this

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters

Which diagram best shows how fraction bars can be used to evaluate 1/2 divided by 1/4?

Write the point slope form of the equation of the line passing through the points (-5, 6) and (0.1).