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3 years ago

What is 2(n-3) = 4n +1

Mathematics

2 answers:

mixas84 [53]3 years ago

8 0

Answer:

n = (-3.5)

Step-by-step explanation:

irina1246 [14]3 years ago

3 0

Answer:

n=-3.5

Step-by-step explanation:

my picture look at it. the answer is wrong but it's the same steps.

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Miss Sarah only wants one half of a sandwich she says Mr. tom will need one 16th of a pound of cheese for her sandwich Mr. Tom s

ch4aika [34]

Miss Sarah will need the same amount as Mr. Tom if she divides 1/16 by 2 and get 1/8. So they will have the same amount of cheese as the other person does

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3 years ago

What is the length of PQ , rounded to the nearest tenth.

Assoli18 [71]

Answer:

10.8 units

Step-by-step explanation:

7 0

3 years ago

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

3. Given the following similar triangles. Find the values of variables and label all the unknown angles

astraxan [27]

Answer:

The answer to your question is x = 6 and y = 9

Step-by-step explanation:

Data

AB = x DF = 18

BC = 5 FE = 15

AC = 3 DE = y

Process

1.- Find y

Use proportions to find it

DE/FE = AC/BC

Substitution

y/15 = 3/5

Solve for y

y = 15(3/5)

y = 45/5

y = 9

2.- Find x

AB/DF = BC/FE

Substitution

x/18 = 5/15

Solve for x

x = 18(5/15)

x = 90/15

x = 6

8 0

3 years ago

Which of the following equations is used to find the value of c?

erica [24]

Answer:

D. $a^{2} + b^{2} = c^{2}$

Step-by-step explanation:

Pythagorean Theorem

5 0

2 years ago

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