The school store opened on the first day of school with 35 notebooks and 15 pencils. within 2 days it sold all of those items. on the first day, twice as many notebooks were sold as pencils. on the second day, for every 5 notebooks sold, 2 pencils were sold. how many notebooks and how many pencils were sold on each day

Is a positive integer raised to a negative power always positive

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

How can you tell when x and y are not directly proportional?