The sum of two numbers is 36. the first number is one fifth 1 /5 of the second number. what are the numbers?

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?

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

Ineed me i stuck and i don’t want to get it wrong