Find the value of X. m<a=(5×+2)

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

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?

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)