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Alekssandra [29.7K]
3 years ago
13

What is the answer of 2+y=11​

Mathematics
2 answers:
ss7ja [257]3 years ago
6 0

Answer: 9

Step-by-step explanation:

Minus 2 from both sides to make it equal.

  • 2 + y = 11
  • -2         -2
  • y = 9
Sergeu [11.5K]3 years ago
4 0

Answer:

9

Step-by-step explanation:

11 - 2 = 9

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1) Ten samples of a process measuring the number of returns per 100 receipts were taken for a local retail store.
densk [106]

Answer:

E) .0863

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{p(1-p)}{n}})

Solution to the problem

For this case we can find the sample proportion for each observation with the following formula:

\hat p = \frac{X}{n}

Where X represent the number of returns and n =100 for each case since the standard value used. Using the last formula we got:

p_1 = \frac{10}{100}=0.1

p_2 = \frac{9}{100}=0.09

p_3 = \frac{11}{100}=0.11

p_4 = \frac{7}{100}=0.07

p_5 = \frac{3}{100}=0.03

p_6 = \frac{12}{100}=0.12

p_7 = \frac{8}{100}=0.08

p_8 = \frac{4}{100}=0.04

p_9 = \frac{6}{100}=0.06

p_{10} = \frac{11}{100}=0.11

And now witht those values we can find the sample mean of proportions with the following formula:

hat p = \frac{\sum_{i=1}^n p_i}{n}= \frac{0.1+0.09+0.11+0.07+0.03+0.12+0.08+0.04+0.06+0.11}{10}=0.081

And we can find the standard error with the following formula:

SE= \sqrt{\frac{\hat p (1-\hat p)}{n}}=\sqrt{\frac{0.081(1-0.081)}{10}}=0.0863

So then the best option on this case is given by:

E) .0863

6 0
3 years ago
El Generico public high school got a new flagpole. But they completely forgot to buy a cord and NO ONE knows how tall the flagpo
Pie
In measurement problems such as these, we can use proportional relationships to determine the length or measure of triangular sides.This works because the two figures are similar. Our proportion is going to have a variable since we do not know the height of one of the flagpoles. It will be set up as such: 

\frac{5}{8} = \frac{x}{32}

We cross multiply, then divide to solve this proportion.

32 x 5 = 160. 

160/8 = 20. 

This means the height of the flagpole is 20 feet high. To fit the height of the flag pole, the cord the school should buy for the flagpole should be 20 feet long. 

5 0
4 years ago
A cheetah can run up to 75 miles per hour how many yards per minute is this
Nataly [62]
75 miles per hour means,
75 miles per 60 minutes.
And this makes 1.25 miles per 1 minute.
1 mile is 1760 yards.
So 1.25 miles is ;
1.25 * 1760 = 2200 yards.
Answer is 2200 yards per minute.
6 0
3 years ago
What fraction of the months begin with the letter "A"?
Anestetic [448]
2/12 because of April and August but in simplest form it would be 1/6
4 0
4 years ago
Read 2 more answers
Can anyone help me on what’s -4 - (-3) plsss it’s for my math test
ololo11 [35]

Answer:

-1

Step-by-step explanation:

It is negative 1 because the signs for the -3 are the same so you keep the -4, change the - to a +, then flip the negative 3.

Hope this helps!

7 0
3 years ago
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