Last school year, Pecan Shores School District had 150 school days on the calendar. During the school year, Pecan Shores had to cancel 9 school days because of a hurricane and 6 days because of an ice storm. What percent of the school days did the school district have to cancel?

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Don't know how to find x given these segment lengths

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0