Which equation can be used to find the answer? a playground with four sides has a perimeter of 52 ft. three of the sides have lengths of 9 ft, 16 ft, and 19 ft. what is the length of the fourth side? a. s – 9 + 16 + 19 = 52 s =26 26 ft b. s + 9 + 16 + 19 = 52 s = 8 8 ft c. s – 52 = 9 + 16 – 19 s = 58 58 ft d. s – 9 – 16 – 19 = 52 s = 96 96 ft

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%

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)