Amoterist travels a distance of 406 km . during a 7 hour period . what was the average speed

7x+8y=-18, 4x-9y=-3 solve the system of equations

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

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