Joshua can purchase tile at one store for $0.99 per tile but he will have to rent a tile saw for $25 at another store he can buy for 1.50 per tile and borrow a tile saw for free find the number of tiles for which the cost is the same

Can someone tell me if this is perpendicular? !

How much money does ron have left each month after his fixed expenses? ron graduated from college five years ago. he recently bought a house, but shares it with a housemate who pays him $800 a month for rent and utilities. ron is putting a budget worksheet together so he will have a better idea of where his money is going and where he can save. enlarge

What is the sum of 25x + 15y and (-18x - 6y)