Rick is buying a t-shirt and a sweater.The sweater costs 3 times as much as the t-shirt.The cost of the sweater is 27$. How much does the t-shirt cost?

9$

Step-by-step explanation:

The way you undo multiplication is division. If the sweater costs 27$, you divide that by 3 to get a third of the cost.

Area of the rectangle = ( x²+12x+27)unit²

Step-by-step explanation: Length = x+3  Breadth = x+9

∴ Area of Rectangle = L×B

(x+3)(x+9) = x²+9x+3x+27 = (x²+12x+27) unit²