The difference of the square of a number and 4 is equal to 3 times that number. Find the negative solution

Bella want to know what the students at her school think of her show. which is the best group to survey to find this information a. go to the mall and ask all of the students she recognizes from school b. ask her viewers to call in durning an episode of the show c. get a list of students at her school from the office and use a random number generator to pick 30 of them d. get a list of students at her school from the office and pick the first 30 students on the list

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart