There are 270 at colfax middle school, where the ratio of boys to girls is 5: 4. there are 180 students at winthrop middle school where the ratio of boys to girls is 4: 5. the two schools hold a dance and all students from both schools attend. what fraction of the students at the dance are girls? make sure to show all work.

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

Aline that intersects one of two parallel lines intersects the other also always sometimes never

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655