An interior designer purchased 4 1/2 yards, 6 2/3 yards and 9 1/4 yards of fabric to make curtains how many yards of fabric did they purchase?

Need this asap if anyone can i would be very grateful. if you could show workings that would really

If i have a 24 in loaf of bread and i cut it into two pieces one 9 in how long was the other

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?