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3 years ago

Simplify by factoring. What are the excluded values? Choose all that apply.

Mathematics

1 answer:

makvit [3.9K]3 years ago

6 0

Answer:

x = -2

x = 8

Step-by-step explanation:

Excluded values are the ones which make the denominator zero

3x² + x - 10

3x² + 6x - 5x - 10

3x(x + 2) - 5(x + 2)

(x + 2)(3x - 5)

x² - 6x - 16

x² - 8x + 2x - 16

x(x - 8) + 2(x - 8)

(x - 8)(x + 2)

[(x + 2)(3x - 5)] ÷ [(x - 8)(x + 2)]

(3x - 5)/(x - 8)

So excluded values are 8, -2

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Of 560 marbles in a bag, 65% are red and the rest are blue. After 28 red marbles are replaced with blue ones, how many blue marb

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Step-by-step explanation: Given that there are 560 marbles in a bag, out of which 65% are red and rest are blue.

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Now, if 28 red marbles are replaced by blue marbles, the the new number of red and blue marbles will be

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Now, to get 65% of the marbles blue, we need to add some more blue marbles to the bag. Let 'x' number of blue marbles are added to the bag, then

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Thus, 400 blue marbles need to be added to the bag.

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