A football team lost 5 yards on each of 3 plays. Explain how you could use a number line to find the teams change in field position after the 3 plays

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

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