Which one? first or second

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

Is it true or false i’m trying to pass this test so i can leave school

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