Help with me mafs pleaze

In the football stadium, there are 18 empty seats out of 360 total seats. (1a) write the ratio of empty seats to total seats as a fraction in simplest form. (1b) then explain its meaning.

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15