Write an expression to represent

the sum of four and the product of three and a number x

Write a recursive sequence that represents the sequence defined by the following explicit formula:

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

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?