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2 years ago

Evaluate 9 ÷ 3[(18 − 6) − 22]. 0.188 0.375 24 48

Mathematics

2 answers:

Natasha2012 [34]2 years ago

6 0

Answer:

Step-by-step explanation:

0.375

Yakvenalex [24]2 years ago

5 0

Answer:

The value of the expression is -0.3

Step-by-step explanation:

Consider the provided expression.

$9 \div 3[(18 - 6) - 22]$

According to PEMDAS rule we first solve parenthesis, exponents, multiplication, division, addition, subtraction.

Solve the parenthesis as shown:

$9 \div 3[(12) - 22]$

Open the parenthesis

$9 \div 3[12- 22]$

$9 \div 3[-10]$

$9 \div (-30)$

$-0.3$

Hence, the value of the expression is -0.3

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The Energy Information Administration records the price of electricity in the United State each month. In July 2013, the average

saw5 [17]

Answer:

89% of the time that average price of electricity is expected to be in the interval from 5.62 cents per kw-h to 18.22 cents per kw-h

Step-by-step explanation:

Chebyshev's inequality states that:

When K = 2, 75% of the data is within two standard deviations of the mean

When K = 3, 89% of the data is within 3 standard deviations of the mean

In this problem, we have that:

Mean = 11.92 cents per kw-h

Standard deviation = 2.1 cents per kw-h

What can you determine about these data by using Chebyshev's Inequality with K=3?

3 standard deviations below the mean

11.92 - 3*2.1 = 5.62 cents per kw-h

3 standard deviations above the mean

11.92 + 3*2.1 = 18.22 cents per kw-h

So you can determine that 89% of the time that average price of electricity is expected to be in the interval from 5.62 cents per kw-h to 18.22 cents per kw-h

6 0

2 years ago

What is the answer to 19=-3a-5

stepan [7]

Answer:

$\fbox{ \huge{ \sf{ a = - 8}}}$

Step-by-step explanation:

$\bigstar{ \sf{ \: 19 = - 3a - 5}}$

$\tt{Step \: 1 \: }$ : Swap the sides of the equation

$\longmapsto{ \sf{ - 3a - 5 = 19}}$

$\tt{Step \: 2 \: }$ : Move 5 to right hand side and change it's sign

$\longmapsto{ \sf{ - 3a = 19 + 5}}$

$\tt{Step \: 3 \: }$ : Add the numbers : 19 and 5

$\longmapsto{ \sf{ - 3a = 24}}$

$\tt{Step \: 4 \: }$ : Divide both sides by -3

$\longmapsto{ \sf{ \frac{ - 3a}{ - 3} = \frac{24}{ - 3}}}$

$\tt{Step \: 4}$ : Calculate

$\longmapsto{ \sf{a = - 8}}$

$\sf ∴ \: the \: value \: of \: a \: is \: - 8.$

$\sf{Hope \: I \: helped !}$

$\sf{Best \: regards !!}$

~ $\sf{TheAnimeGirl}$

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2 years ago

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Alexeev081 [22]

The answer to a subtraction problem is called the difference.

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Please help me

DanielleElmas [232]

The answer is B, because 44 is greater than 42. I hope this helps!

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A firefighter sees a woman trapped in a building 47 feet up from the bottom floor. If the firefighter is parked 43 feet away fro

Airida [17]

Answer:

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Step-by-step explanation:

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