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Levart [38]
3 years ago
11

I need help with 6 & 8

Mathematics
1 answer:
zimovet [89]3 years ago
7 0
1. We need to get rid of those pesky parentheses. We do this by distributing the 3.

2. We need to get "n" by itself, so we add 9 to both sides.

3. Add like terms.

4. Now, we need to get rid of the -9, so we divide both sides by -9. Remember that dividing by negative numbers changes the direction of the "greater than or equal to" symbol.

5. We divide, and the negatives cancel.

I wrote the answer both ways so that I could tell what the number line needed to look like.

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Which expression is equivalent to 33.63. 23 without exponents?
ehidna [41]
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3 0
3 years ago
The standard deviation for a set of data is 6.5. The mean is 255. What is the Margin of Error?​
HACTEHA [7]

Answer: The margin of error is 12.74.

Step-by-step explanation:

Since we have given that

Standard deviation = 6.5

Mean = 255

Let 95% level of significance,

So, z value = 1.96

We need to find the "Margin of error":

So, it becomes :

Margin of error = Standard deviation × z-value

Margin of error = 6.5\times 1.96=12.74

Hence, the margin of error is 12.74.

3 0
3 years ago
Solve for x in the equation.
oksano4ka [1.4K]
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(x + 10)^2 = 36

x + 10 = \pm \sqrt{36}

x + 10 = 6   or   x + 10 = -6

x = -4   or   = -16
5 0
3 years ago
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