Ill mark brainlist plss help

Which term applies to agb and dge? a. obtuse b. supplementary c. complementary d. vertical

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

With this question, the answer with the red arrow is incorrect!