The sum of 30 times (1-3)^(n-1) from n=1 to infinity

Tcan be concluded that % of the seniors would prefer to see more candid pictures in this year's edition of the yearbook.

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at link to the chart is here

X+ y = 5 ; x - y =3 solve using linear combination