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Mazyrski [523]
3 years ago
7

Factorise 5x(squared) + 17x -12 3x(squared) + 10x +7

Mathematics
1 answer:
Delvig [45]3 years ago
6 0
5x² + 17x - 12
5x² - 20x + 3x - 12
5x(x) - 5x(4) + 3(x) - 3(4)
5x(x - 4) + 3(x - 4)
(5x + 3)(x - 4)

3x² + 10x + 7
3x² + 3x + 7x + 7
3x(x) + 3x(1) + 7(x) + 7(1)
3x(x + 1) + 7(x + 1)
(3x + 7)(x + 1)
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The amount c in grams of a 100 gram sample of carbon-14 remaining after t years is represented by the equation c= 100 (0.99988)t
tigry1 [53]

Answer: The amount of carbon-14 remaining after 4 years is 99.95 grams.

Step-by-step explanation:

Hi, to answer this question we simply have to substitute t=4 in the equation given and solve for c.

c= 100 (0.99988)^t

c =100 (0.99988)^4

c = 100 x 0.999520086

c= 99.95200864 ≅99.95 grams (rounded)

The amount of carbon-14 remaining after 4 years is 99.95 grams.

Feel free to ask for more if needed or if you did not understand something.

8 0
3 years ago
Help ASAP. Can somebody please tell if this is the correct answer. If not put the correct answer And help me if I need to graph
RSB [31]

Answer: closed circle pointing to the right.

Step-by-step explanation:

Given that the inequality equation is

6 ( 2 - 3y ) < = 36

Open the bracket

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Collect the like terms

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Make y the subject of formula

The inequality sign will change the moment you multiply or divide both sides by negative numbers

Y > = - 24/18

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That is y is greater than or equal to negative 4/3

Graphing the above inequality,

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The arrow will point to the right and it will be a closed circle since it is greater than or equal to.

8 0
4 years ago
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