Subtract. Write your answer in simplest form.

5 1/2- 1 2/7

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

The surface area of the triangular prism is .

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