On a bookshelf, there are five different mystery books and six different biographies. how many different sets of four books can emilio choose if two of the books must be mystery books and two of the books must be biographies?

Carter drank 15.75 gallons of water in 4 weeks. he drank the same amount of water each day.a. estimate how many gallons he drank in one day.b. estimate how many gallons he drank in one week.c. about how many days altogether will it take him to drink 20 gallons?

Enter the number of complex zeros for the polynomial function in the box. f(x) = x+ + 5x² +6

The table below shows the angle measurements for triangle abc and triangle xyz. if triangle abc is similar to triangle xyz, what does angle z equal, in degrees?