If two men can paint two rooms in two hours, how long will it take for one man to paint one room. assume all rooms are the same size

The price of a dozen eggs was $1.63. suppose the price increases m dollars per dozen and then the price decreases $0.12 per dozen. which expression represents the current price of eggs after the two price changes?

In each diagram, line p is parallel to line f, and line t intersects lines p and f. based on the diagram, what is the value of x? ( provide explanation)

Sole the equation 6n + 9 = -3n - 21 - 6 for n