Eleven rectangular 9-inch by 12-inch pictures hang on a wall. How many square inches of the wall's surface area are covered by t
he pictures?
2 answers:
Answer:
there will be about 108 inches
Answer:
1188
Step-by-step explanation:
We multiply all three numbers together. There are two quick ways of doing this; both are shown below:$$11\cdot 9 \cdot 12 = (10 + 1)\cdot 108 = 1080 + 108 = \boxed{1188}$$$$11\cdot 9 \cdot 12 = 99\cdot 12 = (100 - 1)\cdot 12 = 1200 - 12 = \boxed{1188}$$
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