Evaluate using m=7,r=8 and t=2
1.5m-6
2.4m+t
3. R/t
4.mt
5.5t+2m
6.rm
7.3m-5t
8.mr/t

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?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)