2 years ago

What is the sum of the polynomials? (7x2 - 4x) + (2x - 4x4)

Mathematics

1 answer:

irina1246 [14]2 years ago

4 0

Answer:

d) 9x^3 - 8x^2

Explaination:

7x^3 - 4x^2 + 2x^3 -4x^2

= 9x^3 - 8x^2

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Which expression is equivalent to the square root of 2^5/18

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1.77777777778 would be the answer you are looking for I think.

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3 years ago

The mean amount purchased by a typical customer at Churchill’s Grocery Store is $23.50, with a standard deviation of $5.00. Assu

m_a_m_a [10]

Answer: 0.0170

Step-by-step explanation:

Given : The mean amount purchased by a typical customer at Churchill’s Grocery Store is $23.50, with a standard deviation of $5.00.

i.e. $\mu=23.50$

$\sigma=5$

We assume the distribution of amounts purchased follows the normal distribution.

Sample size : n=50

Let $\overline{x}$ be the sample mean.

Formula : $z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

Then, the probability that the sample mean is at least $25.00 will be :-

$P(\overline{x}\geq\25.00)=P(\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\geq\dfrac{25-23.50}{\dfrac{5}{\sqrt{50}}})\\\\=P(z\geq2.12)\\\\=1-P(z$

Hence, the likelihood the sample mean is at least $25.00= 0.0170

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3 years ago

Kevin is 3 times as old as Daniel. 4 years ago, Kevin was 5 times as old as Daniel. How old is Daniel now

matrenka [14]

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3 years ago

What is the density of a substance that has a mass of 25 grams and a volume of 100 ml? Need help asap

zhuklara [117]

Answer:

0.25

Step-by-step explanation:

density= m/v

density= 25/100

density=.25

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3 years ago

Determine the unit rate. Use mental math when you can. 6 golf balls for $15

Lena [83]

Answer:

1 golf ball : $2.50

Step-by-step explanation:

You can first divide 6 and 15 by 3, and get 2 and 5.
Then, you divide 5 by 2, which is 2.5
Therefore, the unit rate is 1 golf ball : $2.50

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2 years ago