Sean has a bag containing x green marbles and two bags containing y blue marbles. he adds 15 marbles to the bag of green marbles and adds 6 marbles to each bag of blue marbles. the total number of marbles in all three bags is given by the expression (x + 15) + 2(y + 6). identify an equivalent expression.

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

27 is what percent of 108? 27 is % of 108

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.