Find the positive square root of each number for 121 over 196

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Solve 2x+y=3 x+y=5 in substitution method

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)