Stuck on a couple math questions! could anyone me understand them? 1. what is the solution of the equation when solved over the complex numbers? x^2+24=0 enter your answers, as exact values, in the boxes. x = __or x =__ 9. solve. x^2−9x+3=0 enter your answers, as exact values, in the boxes. x = or x = 11. solve for x over the complex numbers. x^2+4x+13=0 enter your answers in the boxes. x = or x =

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.

Can someone answer this question for me

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?