Answer please
76, 88, 81, 85, 86, 91, 68, 78, 72, 84, 82, 90, 69, 70, 75, 87, 79

Which expression is equivalent to 64 - 9x^2?

Which of the following is the major negative aspect of crossover designs for research studies? a. prohibitive cost b. residual effects c-subject drepout d. incomplete randomization e. large sample size required

Iknow the answer but the calculator doesn't seem to give the right one