3 years ago

What is the answer of (x + y + 2) (y+1)?

Mathematics

1 answer:

adelina 88 [10]3 years ago

3 0

You have to combine like terms. The answer would be:

xy+y^2+x+3y+2

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Analyze this equation.

sammy [17]

The answer is b. Hope this helped

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3 years ago

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What is the slope of the lines that are parallel to the line defined by the equation y = -x – 4?

Svet_ta [14]

Answer:

slope = -1

Step-by-step explanation:

parallel lines have the same slope,

y = -x – 4

=> y = -1(x) -4

↑ slope

y = mx + b

↑ slope

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3 years ago

Write a word problem whose solution is |-70|=70

devlian [24]

What is the absolute value of -70.

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3 years ago

What is the answer of:<br> z^2 - 4z^2

Novosadov [1.4K]

$z^2 - 4 z^2$

$z - 4z$

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hope this helps!.

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3 years ago

Suppose the population standard deviation is σ = 5 , an SRS of n = 100 is obtained, and the confidence level is chosen to be 98%

beks73 [17]

Answer:

1.165.

Step-by-step explanation:

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

$\alpha = \frac{1-0.98}{2} = 0.01$

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

So it is z with a pvalue of $1-0.01 = 0.99$ , so $z = 2.33$

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.

In this problem, we have that:

$\sigma = 5, n = 100$ . So

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

$M = 2.33*\frac{5}{\sqrt{100}} = 1.165$

So the correct answer is:

1.165.

6 0

4 years ago