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3 years ago

Which expression is equivalent to 2(4 + x) + 3 ?

Mathematics

1 answer:

Elden [556K]3 years ago

6 0

The correct answer is A. 2*4+x+3

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A group of kids just finished trick-or-treating. The number of pieces of candy collected by each of the 5 kids

NemiM [27]

Answer:

$s = \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

$s =\sqrt{\frac{(31-35)^2 +(33-35)^2 +(36-35)^2 +(41-35)^2 +(34-35)^2}{5-1}} =3.808$

And the answer for this case would be :

$s= 3.81$ after round the value

Step-by-step explanation:

We have the following data set given:

31, 33, 36, 41, 34

If we want to find the standard deviation we need to find first the sample mean with this formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X = \frac{31+33+36+41+34}{5}= \frac{175}{5}= 35$

Now we can find the sampel deviation with this formula:

$s = \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And replacing we got:

$s =\sqrt{\frac{(31-35)^2 +(33-35)^2 +(36-35)^2 +(41-35)^2 +(34-35)^2}{5-1}} =3.808$

And the answer for this case would be :

$s= 3.81$ after round the value

6 0

4 years ago

What is 4b + 7a - 8?

IRISSAK [1]

The answer is 3ba I hope this is right

5 0

3 years ago

What is the value of 24 + 32 - 5? A. 6 B. 9 C. 12 D. 17 E. 20

Bas_tet [7]

Answer:

the is 51

Step-by-step explanation:

24 + 32 + -5 is 51

3 0

3 years ago

Need help before 7:05am and have to show my work THE EQUATIONS IS ON THE PAPER

Pie

Please share the equation.

5 0

4 years ago

An architect built a scale model of a

gladu [14]

Answer:

The right answer is D ( 12 in )

3 in - - - - > 45 feet

x in - - - - > 180 feet

-----------------------------

45*x=3*180 - - > 45*x=540 - - > x=540/45=12

4 0

3 years ago