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3 years ago

Estimate the area of a rectangle with side lenghts 3.54 and 8.43cm

Mathematics

1 answer:

aleksandrvk [35]3 years ago

6 0

The answer is 29.8422cm
Working:
3.54 * 8.43 = 29.8422

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Find the slope of the line passing through the<br> points<br> (-9, 2) and (7, 2).

Alisiya [41]

Answer:

Step-by-step explanation:

-y₁ + y₂\-x₁ + x₂ = m

$\frac{ - 2 + 2}{9 + 7} = \frac{0}{16} = 0$

I am joyous to assist you anytime.

3 0

4 years ago

We draw a random sample of size 36 from a population with standard deviation 3.5. If the sample mean is 27, what is a 95% confid

inessss [21]

Answer:

The 95% confidence interval for the population mean is between 25.86 and 28.14.

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:

$\alpha = \frac{1-0.95}{2} = 0.025$

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 $1-0.025 = 0.975$ , so $z = 1.96$

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.

$M = 1.96\frac{3.5}{\sqrt{36}} = 1.14$

The lower end of the interval is the sample mean subtracted by M. So it is 27 - 1.14 = 25.86

The upper end of the interval is the sample mean added to M. So it is 27 + 1.14 = 28.14

The 95% confidence interval for the population mean is between 25.86 and 28.14.

3 0

3 years ago

Read 2 more answers

What are the coefficients in the expression 24x -3y + 7z

enyata [817]

The Coefficients is the number before the variable so in this case the coefficients are

24
3 or -3
and 7

Hope this helps!

6 0

3 years ago

If p=3+2√2 find the value of p+1/

coldgirl [10]

Answer:

3+1=4

3 + 2 sqrt2

Step-by-step explanation:

5 0

3 years ago

What is the equation of the axis of symmetry of the graph of y-ax? +bx+c?

Svetllana [295]

Answer:

x= -b/2a

Step-by-step explanation:

hello :

y = ax²+bx+c .... (a≠0)

the equation of the axis of symmetry of this graph is : x= -b/2a

6 0

4 years ago