Standard deviation 10 16 18 22 30 42 50

Which of the following is the true for f(x) = 5cos

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.

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12