Mrs. roberts is 3 times as old as her son. the sum of thier ages is 48 years. how old was mrs. roberts when her son was vactions

Consider the reaction 2x2y2+z2⇌2x2y2z which has a rate law of rate= k[x2y2][z2] select a possible mechanism for the reaction.

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?

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -