Simplify each expression.
(4 - 4r2) - (4 - 3r2)

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

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