Sabrina has 12 spools of ribbon. Each spool has either 3 yards of ribbon,
5 yards of ribbon, or 8 yards of ribbon. If
Sabrina has a total of 68 yards of
ribbon, how many spools of each length
of ribbon does she have?

Driving 75 mph, it takes alicia 2 hours to reach the airport to go on a vacation. it then takes her 4 hours to get to her destination with the jet traveling at a speed of 400 mph. how many miles does alicia travel to get to her destination?

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Which graph has a rate of change of zero