Tell weather each equation has one solution , zero solution or infinte solutions really easy : )

I'll give brainliest if you answer right : )

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?

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.