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pashok25 [27]
3 years ago
6

I need help with these problems!!!

Mathematics
1 answer:
Tpy6a [65]3 years ago
3 0

Answer:

Step-by-step explanation:

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3c+2d=-24 and 2c+5d= -38
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Answer:

c=-4, d=-6

Step-by-step explanation:

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2 years ago
Round 24/43 to the nearest thousandth
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2 years ago
What is the value of x in the figure? <br><br><br> x= ?
Otrada [13]
X = 68

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6 0
2 years ago
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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

5 0
3 years ago
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