9-2 in fractions simplest form answer

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

Acampus club held a bake sale as a fund raiser, selling coffee, muffins, and bacon and eggs sandwiches. the club members charged $1 for a cup of coffee, 3$ for a muffin , and $4 for a back. and egg sandwich. they sold a total of 55 items , easing $119. of the club members sold 5 more muffins than cups of coffee, how many bacon and egg sandwiches he’s did they sell

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?