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zhuklara [117]
2 years ago
5

Todd uses white tiles and some black tiles to make mosaic the mosaic has a total area of 144 square centimeters each tile has an

area of 3 square centimeters how many black tiles did Todd use
Mathematics
1 answer:
Rainbow [258]2 years ago
4 0

Answer:

27 tiles

Step-by-step explanation:

Here is the complete question :

Todd uses 21 white tiles and some black tiles to make a mosaic.the mosaic has a total area of 144 square centimeters. Each tile has an area of 3 square centimeters. How many black tiles did Todd use

<u><em>Steps to take to determine the answer</em></u>

  1. Determine the total area of the white tiles used. This can be determined by multiplying the number of white tiles by the area of a tile
  2. subtract the area of the white tiles from the total area of the mosaic.
  3. Divide the answer derived in the previous step by 3

Area of the white tile = area of each tile x total white tiles used

3 x 21 = 63cm²

144cm² - 63cm² = 81cm²

Number of black tiles used = 81cm² / 3cm² = 27 tiles

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