What is the total mass, in kilograms, of the 7rocks

Astudent simplified a rational expression as shown.

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be bale to prepare using the sauce?

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?