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3 years ago

Use the drop-down menus to choose steps in order to correctly solve 6n = 30 + 3(n – 4) for n.

Mathematics

2 answers:

ahrayia [7]3 years ago

8 0

Answer:

n=6

Step-by-step explanation:

6n = 30 + 3(n – 4)

Distribute

6n =30 +3n -12

Combine like terms

6n = 18 +3n

Subtract 3n from each side

6n-3n = 18+3n-3n

3n = 18

Divide each side by 3

3n/3 =18/3

n =6

Nezavi [6.7K]3 years ago

4 0

Hope this will help u:)✌✌

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Dr. V.R. Bencivenga and Dr. Stephen Donald Economics 329 HOMEWORK QUESTION - Belief in global warming In a large city a certain

Dmitry [639]

Answer: d. 1068

Step-by-step explanation:

Let p be the proportion of adults believe that global warming is a liberal hoax designed to hurt oil companies.

Given : You plan to take a survey of n adults to "estimate" this proportion. You want to be able to say that your estimate is within three percentage points (i.e., within 0.03) of the true proportion, with 0.95 probability.

Margin of error : E= 0.03

We know that the z-value for 95% confidence = $z_c=1.96$

Since the prior proportion of adults believe that global warming is a liberal hoax designed to hurt oil companies.

We assume p = 0.5

Then by Central Limit Theorem , the required sample size would be :

$n=p(1-p)(\dfrac{z_{c}}{E})^2$

$\Rightarrow\ n=0.5(1-0.5)(\dfrac{1.96}{0.03})^2$

Simply , we get

$n=1067.11111111\approx1068$ [Rounded to the next whole number.]

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4 years ago

What is a to the -6th power using a positive exponent

pentagon [3]

$a^{-6}=\left(\dfrac{1}{a}\right)^6=\dfrac{1}{a^6}$

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3 years ago

Evaluate 5x² – 3x+2 for x = -3, A. -52 B. 28 C. 38 D. 56

hoa [83]

Answer:

Step-by-step explanation:

We just plugin -3 for all the x values. We get: 5(-3)^2+-3(-3)+2.

(-3)^2=9, -3(-3)= 9 because it is the same as (-3)^2.

We get 5(9)+9+2=>45+11=>56=>D.

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4 years ago

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Naya [18.7K]

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4 years ago

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A bag contains 28 counters all of different colours. Colin chooses one counter and gives it to

yawa3891 [41]

Answer:

756 ways

Step-by-step explanation:

Given

$Counters = 28$

$Selection = 2$

Required

Determine the number of ways

The first counter can be selected in 28 ways

The second can be selected in (28 - 1) ways

The number of selection is:

$Selection = 28 * (28 -1)$

$Selection = 28 * 27$

$Selection = 756$

Hence, number of possible selection is 756

6 0

3 years ago