12, 42, 72, 102 common difference/ratio?

r = -30
d = 30
d = 13
r = 13

11. minitab software was used to find the lsrl for a study between x=age and y=days after arthroscopic shoulder surgery until an athlete could return to their sport. use the output to determine the prediction model and correlation between these two variables. predictor coef se coef t p constant -5.054 4.355 -1.16 0.279 age 0.2715 0.1427 1.9 0.094 r-sq = 31.16%

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.