Which of the following expressions is in its simplest form? a) 8m + 4n - 5mn + 7 b) 15bd + 5 - 2b + 3d + 23 c) xy + 6xy^2 - 7 + 12xy d) 35 - a^2 - ab^2 + ab - 2ab^2

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?

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

Vinay constructed this spinner based on the population of teachers at his school according to vinays model what is the probability that he will have a male history teacher two years in a row