What is the best estimate for the product of 287 and 7

Which expression is equivalent to 2x^2+7x+4?

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct

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