John is now 3 times as old as his brother Sam. In 5 years, John will be twice as old as Sam will be then. Find their present ages ​

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population, find the population standard deviation, o.79828588912497

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.