In a 30-60-90 triangle, how many sides do you need to know in order to determine the remaining sides

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?

Find the y-intercept and x-intercept for the equation 5x-3y=60 what is the y-intercept

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2