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Aneli [31]
2 years ago
15

Select ALL the correct answers.

Mathematics
1 answer:
jolli1 [7]2 years ago
4 0

Answer:

(4x+5)(-3x-1) = -12x²-19x-5

Option A:

   (-16x² + 10x - 3) + (4x² - 29x - 2) = -12x²-19x-5

   Option A is correct.

Option B:

   3(x - 5) - 2(6x² + 9x + 5) = -12x²-15x-25

   Option B is wrong.

Option C:

   2(x - 1) - 3(4x² + 7x + 1) = -12x²-19x-5

   Option C is correct.

Option D:

   (2x² - 11x - 9) - (14x² + 8x - 4) = -12x²-19x-5

   Option D is correct.

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Can you identify these numbers as rational or irrational. Please explain.<br><br> -√127 and 291.87
irina [24]
An irrational number/value is one you cannot express in terms of a ration, or a fraction, it cannot be written as fraction

now 291.87... is simple, two decimals, so you use two zeros at the botom and end up with \bf \cfrac{29187}{100} and boom, there you are, a fraction, nice and dandy

now, let's see the first one -√(127)  well, low and behold, 127 is a prime number, and and thus is has no two factors that'd serve as root, so, there's no rational root that'd give that, that makes it irrational
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3 years ago
C is the midpoint of AB . AC=2x +2 and AB=8x. Set up an equation and showing all steps, solve for x and length CB.
olga55 [171]

See the attached drawing for a visual.

Since we know that AC = CB is half the length of AB, we can write that in equation form. The goal is to determine the length of CB = AC = 2x+2

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Now that we know the value of x, we can find the value of CB = 2x+2:

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