All categories

2 years ago

Enter the value of p so that the expression 18n + 27 is equivalent to p(2n + 3)

Mathematics

1 answer:

Mamont248 [21]2 years ago

7 0

Answer:

P = 9

Step-by-step explanation:

When P = 9, we could multiply 9 to (2n+ 3).

We would get:

18n + 27

---------------------------------------------------------------------------------------------------------------

Have a great summer :)

You might be interested in

Jason is 4.52 feet tall his sister is 0.75 times his hight how tall is his sister

STatiana [176]

His sister is 7.895 feet tall.

3 0

3 years ago

Suppose that scores on the mathematics part of a test for eighth-grade students follow a Normal distribution with standard devia

riadik2000 [5.3K]

Answer:

We need an SRS of scores of at least 153.

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:

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

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 $1-0.05 = 0.95$ , so $z = 1.645$

Now, find 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.

How large an SRS of scores must you choose?

This is at least n, in which n is found when $M = 20, \sigma = 150$ . So

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

$20 = 1.645*\frac{150}{\sqrt{n}}$

$20\sqrt{n} = 1.645*150$

$\sqrt{n} = \frac{1.645*150}{20}$

$\sqrt{n} = 12.3375$

$(\sqrt{n})^{2} = (12.3375)^{2}$

$n = 152.2$

Rounding to the next whole number, 153

We need an SRS of scores of at least 153.

8 0

3 years ago

A coffee maker is $49.99. During Black Friday sales, you got it for $33.55.What was the Black Friday sale? Round to the nearest

Dmitry [639]

Answer:

i do not know what it is sorry

7 0

2 years ago

The ground temperature at an airport was 10 degree temperature dropped 5 degrees for every 1000m above the ground. What was the

Mamont248 [21]

The ground temperature started at 10 degrees.
The rate was: for every 1000 meters (m) of going above the ground, the temperature dropped 5 degrees, meaning that it got cooler.
The ratio is 1000 meters to 5 degrees
So that would mean: 10-5-5-5-5-5=-15 degrees

3 0

3 years ago

Which of the following figures have the smallest area?

Drupady [299]

The correct answer is a I think is correct

3 0

2 years ago