Solve 7x2-11x+13=0 by completing the square

Can (3,5 and square root 34) be sides on a right triangle?

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?