A navy boat goes downstream in 2 1/2 hours. Going upstream it traveled the same distance in 4 hours. What is the rate of the boat in still water, and what is the rate of the current?

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )