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geniusboy [140]
3 years ago
10

Determine the value of X. Please help. 50 POINTS

Mathematics
1 answer:
iris [78.8K]3 years ago
5 0

Answer:

102.86

Step-by-step explanation:

cos 55 = 59/x

x = 59/cos 55

x = 102.86

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The standard deviation of a sample taken from population A is 17.6 for a sample of 25.
lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation \sigma_A is

\sigma_A = 17.6

The sample size n_A is:

n_A = 25.

For the sample of population B, the standard deviation \sigma_B is

\sigma_B = 21.2

The sample size n_B is:

n_B = 30.

Then the standard deviation for the difference of means has the following form:

\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}

Finally

\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23

7 0
3 years ago
Can I get help on this problem showing my work?
Evgen [1.6K]
cost \: of \: 1 \:bracelet \\(no\:shipping): \\72 \: dollars - 9 \: dollars \: shipping = \\ 63 \: \div 9 \: = cost \: of \: 1 \: bracelet \: \\ = 7 \: dollars
\\cost \: of \: shipping: \\ 9 \: dollars \: \div 9 \: bracelets \: = \\ 1 \: dollar\: per\:bracelet \\ \\ formula \: for \: cost \: overall: \\ 7y \: + y

y = quantity, for example:

I want to buy 1 bracelet =
1×7 = 7 + 1 = 8$ per bracelet
6 0
3 years ago
Read 2 more answers
In his last football game, Sean rushed for 94 yards. if his season total is now 871 yards, how many total yards did he have prio
Masteriza [31]

it should be somewhere around 110 to 120 yards


4 0
3 years ago
Will mark brainliest!!<br><br> picture included ^^^^<br><br> please and THANK YOU<br><br><br> ^^!!
Alisiya [41]

Answer:

shift the graph up 1 unit

Step-by-step explanation:

d is the vertical shift

+1 means we shift the graph up 1 unit

5 0
3 years ago
An electric guitar is on sale at 40% off. if the sale price is 179.94 ,what is the original.
n200080 [17]
Let x = original price
Knowing that multiplying the original price and the discount is the discount price. We formulate:
x(1 - 0.40) = 179.94
x(0.60) = 179.94
x = 179.94/0.60
x = 299.9
That is about 300 of the original price.
7 0
3 years ago
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