Tim's phone service charges $22.66 plus an additional $0.17 for each text message sent per month. If Tim's phone bill was $26.91, which equation could be used to find how many text messages, x, Tim sent last month?

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

What statement is true? 2x^2-9x+2=-1

If you are dealt 4 cards from a shuffled deck of 52? cards, find the probability that all 4 cards are diamondsdiamonds.