Find the value of x don’t understand how to do this

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?

Find the vertex of the function given below y=x^2-6x+1

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check