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valentina_108 [34]
3 years ago
10

-5+13=k

3 = k" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
Vikentia [17]3 years ago
5 0
Use the communicative property of addition to switch to order and you get
13 - 5, so the answer is 8, or k = 8

OR

-5 + 13 = k
Combine like terms
8 = k
or
k = 8<span />
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Eddie ended round one of a game show with 800 points. In round two, he scored -400 points
german

Answer:

400

Step-by-step explanation:

800-400=400

8 0
3 years ago
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What is the solution for the following system of equations? x +2y= 6
salantis [7]

Answer: The answer to your question is infinitely many solutions

Step-by-step explanation: There is two solutions to the system of equations, which means there is complex solutions, or in other words many solutions. And when you have more than one solution, you have infinitely many solutions. Hope this helps:)

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7 0
4 years ago
A family is relocating from St. Louis, Missouri, to California. Due to an increasing inventory of houses in St. Louis, it is tak
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Answer:

a. Assume that the population has a normal distribution.

b. The 90% confidence interval of the mean sale time for all homes in the neighborhood is between 219.31 days and 240.69 days.

Step-by-step explanation:

Question a:

We have to assume normality.

Question b:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.05 = 0.95, so Z = 1.645.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.645\frac{35}{\sqrt{29}} = 10.69

The lower end of the interval is the sample mean subtracted by M. So it is 230 - 10.69 = 219.31 days.

The upper end of the interval is the sample mean added to M. So it is 230 + 10.69 = 240.69 days.

The 90% confidence interval of the mean sale time for all homes in the neighborhood is between 219.31 days and 240.69 days.

7 0
3 years ago
7 people are running in a race. If we only care about first, second and third place, how many possible outcomes are there?
mr_godi [17]
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8 0
3 years ago
7th grade math help me please
AlexFokin [52]

Answer:

the 2nd answer (II)

Step-by-step explanation:

1 and 2 are not rational if that's what your asking

7 0
3 years ago
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