I was constructing towers, I noticed that each time I made the tower higher, I had to add more blocks on the sides to stabilize the structure. i would like to know how many cubes I will need to build a 5-block highly tower and a 10-block high tower. Generalize, if you can, on how many blocks I will need for any size tower?

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

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.