64 is 4 times the difference between sarahs age ,a, and 44. assume sarah is older than 44

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

The school that imani goes to is selling tickets to the annual dance competition. on the first day of the ticket sales the school sold 7 adult tickets and 5 child tickets for a total of $96. the school took in $40 on the second day by seling 3 adult tickets . find the price of an adult ticket and the price of a child ticket. solve by using substitution elimination college prep algebra math heres the 2 equations i came up with 7x+5y=96 and 3x+2y= -40 show all workiv be stuck on this.

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?