answer to questions about system A and System B. system A x+3y=-9 and x+y=4. System B 3x+4y=-9 and 2x+y=4

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

Me because some of question i don’t understand

It takes jonas 7 1/4 minutes to run the mile. it takes mario 8 5/12 to run the mile. how much faster is jonas than mario? 5/6 minute 1 1/3 minutes 1 1/6 minutes 1 1/2 minutesi will give points and brainlest