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2 years ago

Help please!!!!!! I don't have a lot of time

Mathematics

2 answers:

Papessa [141]2 years ago

5 0

Answer:

Step-by-step explanation:

simplify the exponent

35/8-1

simplify

35/7

simplify

Lina20 [59]2 years ago

4 0

Answer:

Its 5,...................

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hram777 [196]

15 is the correct answer

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2 years ago

A standard deck of 52 cards has four queens. two cards are randomly drawn in succession, without replacement, from a standard de

AnnyKZ [126]

There are a total of 4 queens in a standard deck of 52 cards. The probability that the 2 consecutive draws are queen is:

Probability = (4 / 52) * (3 / 51)

<span>Probability = 12 / 2652 = 0.004</span>

3 0

3 years ago

Read 2 more answers

the performance score of 10 adults is recorded, and the results are 83 87 90 92 93 100 104 111 115 121 find the standard deviati

luda_lava [24]

Answer:

The standard deviation of the data set is $\sigma = 12.7906$ .

Step-by-step explanation:

The Standard Deviation is a measure of how spread out numbers are. Its symbol is σ (the greek letter sigma)

To find the standard deviation of the following data set

$\begin{array}{cccccccc}83&87&90&92&93&100&104&111\\115&121&&&&&&\end{array}$

we use the following formula

$\sigma = \sqrt{ \frac{ \sum{\left(x_i - \overline{X}\right)^2 }}{n-1} }$

Step 1: Find the mean $\left( \overline{X} \right)$ .

The mean of a data set is the sum of the terms divided by the total number of terms. Using math notation we have:

$Mean = \frac{Sum ~ of ~ terms}{Number ~ of ~ terms}$

$Mean = \frac{Sum ~ of ~ terms}{Number ~ of ~ terms}=\frac{83+87+90+92+93+100+104+111+115+121}{10} \\\\Mean = \frac{996}{10} =\frac{498}{5}=99.6$

Step 2: Create the below table.

Step 3: Find the sum of numbers in the last column to get.

$\sum{\left(x_i - \overline{X}\right)^2} = 1472.4$

Step 4: Calculate σ using the above formula.

$\sigma = \sqrt{ \frac{ \sum{\left(x_i - \overline{X}\right)^2 }}{n-1} } = \sqrt{ \frac{ 1472.4 }{ 10 - 1} } \approx 12.7906$

3 0

3 years ago

NEED HELP !!!!!!!!!!!!!!!!!!!!!!!

kati45 [8]

Answer:

Step-by-step explanation:

7 0

3 years ago

If no number can be used more than once, how many different 2-digit numbers can be formed from the digits 4, 6, and 8?

ikadub [295]

Answer:

Six.

Step-by-step explanation:

hoped this helped!

4 0

2 years ago