Eric purchased three music cds and a sweatshirt from a band's online store and received a 20% discount. he paid $100 for his purchase. the following week, the same store offered a 40% discount on all its products. eric's friend neil took advantage of the sale and bought four music cds and two sweatshirts for $120.
assuming that the actual prices of the music cds and the sweatshirts are unchanged, the price of a music cd is $and the price of a sweatshirt is $.

When only separate discreet points are graphed it is called?

In a study of the relationship between socio-economic class and unethical behavior, 129 university of california undergraduates at berkeley were asked to identify themselves as having low or high social-class by comparing themselves to others with the most (least) money, most (least) education, and most (least) respected jobs. they were also presented with a jar of individually wrapped candies and informed that the candies were for children in a nearby laboratory, but that they could take some if they wanted. after completing some unrelated tasks, participants reported the number of candies they had taken. it was found that those who were identiď¬ed as upper-class took more candy than others. in this study, identify: (a) the cases, (b) the variables and their types, (c) the main research question, (d) identify the population of interest and the sample in this study, and (e) comment on whether or not the results of the study can be generalized to the population, and if the ď¬ndings of the study can be used to establish causal relationships.

Given right triangle a w/a hypotenuse length of x+4 and a leg of x, and right triangle b, w/ a hypotense length of 3y and a leg length of y+4 for what values of x and y are the triangles congruent by hl?