What is the value of x?

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%

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

If the value of cos330°is√3/2 then find cos 165°.