Which expression correctly determines ST in triangle STP?

One positive number is 9 more than twice another. if their product is 95, find the numbers

What is the sum of these mixed numbers 4 2/3+ 3 1/9

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