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antoniya [11.8K]
2 years ago
13

Can someone please help me with this its urgent I don’t get it

Mathematics
1 answer:
Varvara68 [4.7K]2 years ago
4 0

Answer:

$1,221

Step-by-step explanation:

0.11×$1,100=$121

$121+ $1100= $1221

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Help plz help plz☺☺​
Sever21 [200]

Answer:

can't see that

Step-by-step explanation:

8 0
2 years ago
What is 38.95 rounded to the nearest tenth
Degger [83]
39. because its close to it lol. 
4 0
3 years ago
The break even point is the point at which income equals expenses expenses Richmond high school is paying $13,200 for the writin
KatRina [158]

Answer:

';lji

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
1) Find the 95 % confidence interval for the mean if σ = 11 , using this sample:
melamori03 [73]

Answer:

The 95 % confidence interval for the mean is between 28.09 and 35.97.

Step-by-step explanation:

Mean of the sample:

30 values.

So we sum all the values and divide by 30.

The sum of all the values(43 + 52 + 18 + ... + 20 + 41) is 961.

961/30 = 32.03

Confidence interval:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.96\frac{11}{30} = 3.94

The lower end of the interval is the sample mean subtracted by M. So it is 32.03 - 3.94 = 28.09

The upper end of the interval is the sample mean added to M. So it is 32.03 + 3.94 = 35.97

The 95 % confidence interval for the mean is between 28.09 and 35.97.

8 0
3 years ago
Help plz I don't uderstand any of these
Archy [21]
So, all you would do is use distribution.
For example: D is .5(x+3) = -3(x-.5)
you would do
.5 times x+3, which equals .5x+ 1.5
So, .5x+1.5=-3x+1.5
because -3*x-.5 is -3x+1.5.
Then, you would just get x by itself.

.5x+1.5=-3x+1.5
add 3 over to .5 = 3.5x;
subtract 1.5 over to 1.5 = 0
now you have 3.5x = 0
divide by 3.5 to get x by itself and you get zero.

x=0

When you substitute it in, you should have them both equal to each other. I hope this helps. :)
3 0
2 years ago
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