Which statement is not always true? the sum of a rational number and an irrational number is irrational the sum of two rational number is rational the product of two irrational numbers is irrational the product of two rational numbers is rational

What signals you that factoring by grouping is the best method to use when factoring a problem?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.