James Anderson School has 156 students. Grade 5 has 43 students and grade 6 has 42 students. What equations can be used to find how many students the rest of the school​ has? Complete the equations. ​___​___x x​___ ​___​___y y​___

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics