Which two of the three equations create a system of equations with no solution. Explain how you determined your answer

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?

The sum of five and a number n is at least 12