If x=8 and y=−2, evaluate the following expression: x−y

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%

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Is the square root of 4 plus the square root of 16 rational?