Let f(x)=6x^2-ax^3 what is the value of a if f has a point of inflection at x=6

Question part points submissions used suppose that 100 lottery tickets are given out in sequence to the first 100 guests to arrive at a party. of these 100 tickets, only 12 are winning tickets. the generalized pigeonhole principle guarantees that there must be a streak of at least l losing tickets in a row. find l.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Which expression is equivalent to -5(3x - 6/7)