Aballoon seller has 4 green balloons, 3 yellow balloons, and 9 silver balloons. roy buys a green balloon. then you buy a balloon at random. what is the probability that you have purchased another green balloon? (type as fraction)

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

Math it's appreciated. (picture provided)

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]