All categories

3 years ago

3 subtracted from 9 times 2 and 5 is added

Mathematics

2 answers:

Gwar [14]3 years ago

8 0

Step-by-step explanation:

Elina [12.6K]3 years ago

8 0

Step-by-step explanation:

it is 20

9×2-3+5= 20

there the correct answer this time

You might be interested in

ccording to the U.S. National Weather Service, at any given moment of any day, approximately 1000 thunderstorms are occurring wo

viva [34]

Answer:

The critical value of z for 99% confidence interval is 2.5760.

The 99% confidence interval for population mean number of lightning strike is (7.83 mn, 8.37 mn).

Step-by-step explanation:

Let X = number of lightning strikes on each day.

A random sample of n = 23 days is selected to observe the number of lightning strikes on each day.

The random variable X has a sample mean of, $\bar x=8.1\ mn$ and the population standard deviation, $\sigma=0.51\ mn$ .

The (1 - α)% confidence interval for population mean μ is:

$CI=\bar x\pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$

Compute the critical value of z for 99% confidence interval is:

$z_{\alpha/2}=z_{0.01/2}=z_{0.005}=2.5760$

*Use a z-table.

The critical value of z for 99% confidence interval is 2.5760.

Compute the 99% confidence interval for population mean number of lightning strike as follows:

$CI=\bar x\pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}\\=8.1\pm2.5760\times\frac{0.51}{\sqrt{23}}\\=8.1\pm0.2738\\=(7.8262, 8.3738)\\\approx(7.83, 8.37)$

Thus, the 99% confidence interval for population mean number of lightning strike is (7.83 mn, 8.37 mn).

The 99% confidence interval for population mean number of lightning strike implies that the true mean number of lightning strikes lies in the interval (7.83 mn, 8.37 mn) with 0.99 probability.

3 0

3 years ago

Find the distance from the point (4,2) to the point (0,1).

vagabundo [1.1K]

Answer:

4.123 units

Step-by-step explanation:

Data provided:

Coordinates of point 1 as ( 4 , 2)

and,

Coordinates of point 2 as ( 0 , 1 )

Now,

The distance between the two point whose coordinates are given is calculated using the formula as:

distance = $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

on substituting the values, we get

distance = $\sqrt{(0-4)^2+(1-2)^2}$

distance = $\sqrt{(-4)^2+(-1)^2}$

distance = $\sqrt{16+1}$

Distance = √17 = 4.123 units

6 0

3 years ago

How do you convert units in length?

Vlada [557]

Just look it up in the internet i think it will tell you

6 0

3 years ago

Help me please summer homework

vladimir1956 [14]

86. Is a negative slope because it slants down from left to right.
87. Is positive slope because it slants up from left to right.
88. Is an undefined slope because it is vertical.
89. Is has a slope of zero because it is horizontal.

8 0

2 years ago

Find the missing values in the ratio table below.

Nataliya [291]

Answer:

attachment

Step-by-step explanation:

Hi there !

trucks/cars = 2/3 = x/9 = 30/y

x = 2×9/3 = 18/3 = 6

y = 3×30/2 = 90/2 = 45

Good luck !

3 0

3 years ago

3 subtracted from 9 times 2 and 5 is added​

3 subtracted from 9 times 2 and 5 is added