A museum charges $8.50 for adult tickets and $5.25 for children's tickets. On Friday they made $650.
a. Write an equation that can be used to model the ticket sales.
b. Graph the equation.

The equation that I came up with is $8.50a + $5.25c = $650. However, I don't know how to graph it or even how to find out how many tickets were sold.

Find a number such that if you add 8 and divide the result by 4 you will get the same answer as if you subtracted 3 from the original number and divided by 2

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?

Given: klmn is a parallelogram m? n=3m? k, lf ? kn , ld ? nm kf=2 cm, fn=4 cm find: lf, ld