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3 years ago

9

Solve for x

-2x = \frac{3 + x}{2} " alt="14 -2x = \frac{3 + x}{2} " align="absmiddle" class="latex-formula">

1 answer:

laiz [17]3 years ago

8 0

The answer is x = 5
~ hope this helps!

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3x^3(4x^4)=?<br> i need this plz

sladkih [1.3K]

Answer:

$12 x^{7}$

Step-by-step explanation:

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3 years ago

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14 ten thousands + 12 thousands

Doss [256]

<u><em>Answer:</em></u>
152,000

<u><em>Explanation:
</em></u>First, we will need to translate the words into numbers and then we will perform the addition.

<span><u><em>1- translating the words into numbers:</em></u>
ten thousands means 10,000
14 ten thousands means 14 * 10000 = 140000
thousands means 1000
12 thousands means 12000

<u><em>2- Performing the addition:</em></u>
14 ten thousands + 12 thousands
= 140000 + 12000
= 152000
</span>
Hope this helps :)

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3 years ago

Hiro painted his room. After 3 hours of painting at a rate of 8 square meters per hour, he had 28 square meters left to paint.

Trava [24]

Answer:

8*3 = 24 + 28 = 52 total square feet

Step-by-step explanation:

The is painting at 8 sq m per hour

so A(t) = -8t +52

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3 years ago

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According to a recent survey, the population distribution of number of years of education for self-employed individuals in a c

strojnjashka [21]

Answer:

a) $n=100,\,\mu_s = 14.7, \,\sigma_s=0.32$

b) $n=400,\,\mu_s = 14.7, \,\sigma_s=0.16$

c) "a.The mean of the sampling distribution stays the same, but the standard error decreases."

Step-by-step explanation:

a) We have a population with mean of 14.7 and standard deviation of 3.2.

We have to calculate the parameters of the sampling distribution (mean and standard deviation), for a sample size of n=100.

The mean for the sampling distribution is the same of the population:

$\mu_s=\mu=14.7$

The standard deviation of the sampling distribution is related to the population standard deviation by the inverse of the square of the sample size:

$\sigma_s=\sigma/\sqrt{n}=3.2/\sqrt{100}=3.2/10=0.32$

b) For a sample size of n=400, the mean is the same (14.7), but the standard deviation becomes:

$\sigma_s=\sigma/\sqrt{n}=3.2/\sqrt{400}=3.2/20=0.16$

c) "a.The mean of the sampling distribution stays the same, but the standard error decreases."

As we calculated, the standard error decreases as the sample size increases. This is because the variability of the variable is reduced as the sample size is bigger.

The mean stays the same independently of the sample size.

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3 years ago

David did not have time to wait for the elevator on the first floor of the building so he decided to go up the stairs. If it too

ICE Princess25 [194]

So do 3 * 3 equals 9 and do the same thing to the minutes. So 2 * 3 equals 6. So it takes 6 minutes for David to reach the 9th floor.

Also if that ^ ain’t correct, then here:

3/2 = 1.5 < minute per floor

1.5 * 9 < that’s the ninth floor

= 13.5

So it takes him 13.5 minutes to reach the ninth floor

Please don’t report me T.T I just gave you two answer in case on doesn’t work.

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3 years ago

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