The basis for using a normal probability distribution to approximate the sampling distribution of the sample means and population mean is

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Atorch and a battery cost 2.50 altogether. the torch costs 1.50 more than the battery. what fraction of the total price is the torch? give your answer in its simplest form.