Aresearcher wants to determine the sample size necessary to adequately conduct a study to estimate the population mean to within 5 points. the range of population values is 80 and the researcher plans to use a 90% level of confidence. the sample size should be at least .

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Using elimination, what is -4x+2y=-12 4x+8y=-24