(algebra, pic attached)The National Honor Society is selling tickets for the spring dance Tickets are $12 for couples and S8 for singles. Let z be the number of couples and y be the number of singles. This system of equations represents the situation in which ticket sales totaled $1,580 and a total
of 250 students attended the dance
12x + 8y = 1,580
22 + y 250
How many singles tickets were sold?

Read the excerpt from the strange case of dr jekyll and mr. hyde what do dr. jekyll's thoughts reveal about him in this excerpt? [t]he inmates of my house were locked in the most rigorous hours of slumber, and i determined, flushed as i was with hope and triumph, to venture in my new shape as far as to my bedroom. i crossed the yard, wherein the constellations looked down upon me, i could have thought, with wonder, the first creature of that sort that their unsleeping vigilance had yet disclosed to he is jealous of those who can sleep through the night. he is revered for his scientific advances. he is interested in studying the movements of the stars he is proud and enthusiastic about his initial results.