If you can give me more information on this I could help you a bit more respond.
There are 6 numbers from 0 to 199 who have 3 factors. These numbers are:-
- 4( factors-1,2,4)
- 9(1,3,9)
- 25(1,5,25)
- 49(1,7,49)
- 121(1,11,121)
- 169(1,13,169).
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Answer:
30 bacteria
Step-by-step explanation:
Answer: Todd used 27 black tiles.
Step-by-step explanation:
Let x represent the number of black tiles that Todd used.
Todd uses 21 white tiles & some black tiles to make a mosaic. This means that the total number of white and black tiles that Todd used is 21 + x
Each tile has an area of 3 square centimeters. This means that the total area covered by the white tiles is
21 × 3 = 63 square centimeters
Also, the total area covered by the black tiles is
3 × x = 3x square centimeters
The mosaic has a total area of 144 square centimeters. This means that
3x + 63 = 144
3x = 144 - 63
3x = 81
x = 81/3 = 27
Step-by-step explanation:
(2x-y+3)(2x-y-3)=
4x²-2xy-6x-2xy+y²+3y+6x-3y-9=
4x²-4xy+y²-9=
(2x-y)²-9
