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2 years ago

What is the Mean Average deviation from the Mean? Numbers: 6, 2, 3, 3, 2, 2

Mathematics

1 answer:

Irina-Kira [14]2 years ago

6 0

Answer:

2.42

Step-by-step explanation:

standard deviation= sqrt(variance)

Variance=E[X2] - E[X]2

E[X] = sum(X)/n=35/9, so E[X]2 = 1225/81

E[X2] =sum(X2)/n = 189/9 = 170/81

Variance= 476/81

Standard deviation = sqrt(476/81) ~2.42

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The student council at Spend too much High School is planning a school dance. The table below shows the budget for the dance.

Pie

The dance would /cost/ the school 50 dollars, making the profit -50. The dance tickets make 300, and the DJ takes away 250, making a 50 profit. However, the decorations cost 100, taking away that from 50, making -50.

4 0

2 years ago

If 3/4 is the dividend and -2/5 is the divisor then what is the quotient ?

Alexxx [7]

Answer:

$\dfrac{-15}{8}$

Step-by-step explanation:

<h3>Fraction division:</h3>

$\sf \dfrac{3}{4} \ \div \dfrac{-2}{5}$

Use KCF method.

Keep the first fraction.
Change division to multiplication
Flip the second fraction.

$\sf \dfrac{3}{4} \ \div \dfrac{-2}{5}=\dfrac{3}{4}*\dfrac{-5}{2}$

$\sf = \dfrac{3*(-5)}{4*2}\\\\ =\dfrac{-15}{8}$

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5 months ago

Solve for xx. Round to the nearest tenth of a degree, if necessary.

Tanya [424]

Answer:

56.6 °

Step-by-step explanation:

For a RIGHT triangle cos (x ) = adjacent leg / hypotenuse

cos (x) = 4.4 / 8

arc cos (4.4/8) = 56.63 ° = ~ 56.6°

8 0

1 year ago

Pls help!!!!!!!<br> 20-27

xeze [42]

Answer:

The probabilities would be 4/11 and 7/11 respectively.

Step-by-step explanation:

1) Total length of the given word i.e. Mathematics = 11

2) Number of vowels in the given word = 4 i.e. a,e,a,i

3) Number of consonants in the given word = 7 i.e. m,t,h,m,t,c,s

4) The probability of choosing a vowel would be 4/11 = 0.3636..

5) The probability of choosing a consonant would be 7/11 = 0.6363...

Step-by-step explanation:

8 0

1 year ago

Which of the following functions gives the length of the base edge, a(v), of a right square pyramid that is 8 inches tall as a f

Vedmedyk [2.9K]

$\text{Given that the height of the right square pyramid is 8 inches}\\
\text{we need to find the length of the base edge of the right square pyramid a(v)}\\
\\
\text{we know that the volume of a right square pyramid with base edge a and }\\
\text{height h is given by}\\
\\
V=\frac{1}{3}a^2 h\\
\\
\text{so using this formula, we get}$

$V=\frac{1}{3}\times a^2 \times 8\\
\\
\Rightarrow V=\frac{8}{3}a^2\\
\\
\text{multiply both sides by }\frac{3}{8}, \text{ we get}\\
\\
a^2=\frac{3V}{8}\\
\\
\text{take square root both sides to get}\\
\\
a=\sqrt{\frac{3}{8}V}\\
\\
\text{Hence the length of the base edge is: }a(V)=\sqrt{\frac{3}{8}V}$

5 0

3 years ago

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