3 years ago

Can someone help fast to find a and c

Mathematics

1 answer:

Kisachek [45]3 years ago

8 0

Answer: 15 10

Step-by-step explanation:

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rjkz [21]

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2 years ago

3x^3-2x^2-147x+98=(ax-c)(bx+d)(bx-d) where a,b,c and d positive integers. Work out the value of a,b,c and d

Alexxx [7]

Expand the right side:

$(ax-c)(bx+d)(bx-d)=(ax-c)(b^2x^2-d^2)$

$=ab^2x^3-b^2cx^2-ad^2x+cd^2$

Notice that 98 = 2 * 7 * 7, so we have $c=2$ and $d=7$ .

Then

$-ad^2=-147\implies a=\dfrac{147}{49}=3$

and

$ab^2=3\implies b^2=1\implies b=1$

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3 years ago

In a normal distribution, what is the probability that a randomly selected data value will fall within two standard deviations o

Zepler [3.9K]

The answer is 95%

This is something you should memorize. Specifically it is from the Empirical Rule (or 68-95-99.7 rule) which gives rough approximations of areas under the curve.

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3 years ago

Which of the following statements is true about an image after a dilation?

tino4ka555 [31]

Answer:

Not sure what the answer choices are, but choose the choice that says the new image is either stretched or shrunk. In a dilation, the shape/corresponding sides of the pre-image are preserved in the new image, but the size of the new image is altered.

Step-by-step explanation:

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3 years ago

Find the area of the shape shown below

Dovator [93]

Answer:

Step-by-step explanation:

the answer is 48

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3 years ago

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