What is the mixed number to 53/12

To complete your spring schedule, you must add calculus and physics. at 9: 30, there are three calculus sections and two physics sections; while at 11: 30, there are two calculus sections and three physics sections. how many ways can you complete your schedule if your only open periods are 9: 30 and 11: 30?

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x