F(x)=-3/5x+k and if f(30)=-11 what is the value of k

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

Which functions are even? check all of the boxes that apply. f(x) = x4 – x? f(x) = x2 – 3x + 2 f(x) = (x - 2) f(x) = x done

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.