Calvin paints pictures and sells them at art shows. he charges $ 56.25 for a large painting. he charges $25.80 for a small painting. last month he sold six large painting and three small paintings. how much did he make in all?

How do you solve a question like this?

You receive 15% of the profit from a car wash how much money do you receive from a profit of 300

The number of 8th graders who responded to a poll of 6th grade and 8 th graders was one fourtg of the number of 6th graders whi responded if a total of 100 students responddd to the poll how many of the students responded were 6 th graders