Only the smartest person in math can answer these. Please help me! At least, try your best to answer most of them!

What is the prime factorization of 195

What expression is equivalent to 42x-56y

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126