All members of the math club paid the same amount for their end-of-year party. the girls paid a total cost of $90 and the boys paid a total of $60. however, buying gifts raised the total cost of $210, so each member paid an additional $2. how many members are girls?

Ms. ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms. ortiz charge per kilogram of tomatoes to make on a load of tomatoes?