Find the value of the variable in the isosceles triangle. show your work plz

What rotation was applied to triangle def to create d’e’f’?

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

4. a single woman uses an online cash flow calculator which reveals a cash flow of 203. what does this mean?