If x is the number of people that come over to dinner, and y is how much ounces of broccoli he needs, then this is your equation:
7x = y is your answer
Because he needs 7 ounces for each person, to find the number of ounces he needs, you multiply 7 by the number of people.
Jill's garden would have a perimeter of 45 feet since congruent shapes have the same dimensions.