A restaurant wants to study how well its salads sell. The circle graph shows the sales over the past few days. If 15 of the salads sold were Caesar ​salads, how many total salads did the restaurant​ sell?

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.