A textbook store sold a combined total of 364 chemistry and psychology textbooks in a week. The number of psychology textbooks sold was 56 less than the number of chemistry textbooks sold. How many textbooks of each type were sold?

What are “like terms”? why can we only add like terms?

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

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.