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4 years ago

Daniel has read 180 pages this is 80% of the entire book how long is the book

2 answers:

8 0

If we take these numbers we can set it up in crops multiplication form to find the answer:

80. 180
—— = ——- then we cross multiply
100 x making 80x= 18000 then divide 18000 and 80 to get 225 meaning x=225 so Daniels book is 225 pages long

DochEvi [55]4 years ago

7 0

225 pages, its correct answer i did the math

180/80
x /100
cross multiply;
180*100=18,000
divide with the amount left
18,000/80=225

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what is the probability of seeing a sample mean for 21 observations less or equal to the sample mean that we observed

kramer

Answer:

$P(x \le 21) = 0.69146$

Step-by-step explanation:

The missing parameters are:

$n = 64$ --- population

$\mu = 20$ --- population mean

$\sigma = 16$ -- population standard deviation

Required

$P(x \le 21)$

First, calculate the sample standard deviation

$\sigma_x = \frac{\sigma}{\sqrt n}$

$\sigma_x = \frac{16}{\sqrt {64}}$

$\sigma_x = \frac{16}{8}$

$\sigma_x = 2$

Next, calculate the sample mean $\bar_x$

$\bar x = \mu$

So:

$\bar x = 20$

So, we have:

$\sigma_x = 2$

$\bar x = 20$

$x = 21$

Calculate the z score

$x = \frac{x - \mu}{\sigma}$

$x = \frac{21 - 20}{2}$

$x = \frac{1}{2}$

$x = 0.50$

So, we have:

$P(x \le 21) = P(z \le 0.50)$

From the z table

$P(z \le 0.50) = 0.69146$

So:

$P(x \le 21) = 0.69146$

4 0

3 years ago

Can anyone figure this out

sergey [27]

Answer:

I know it.

Step-by-step explanation:

triangles always add up to 180 degrees so add 43 and 32 together and you will get 75 so then you take 75 off 180 and you will get 105

that's your answer

A = 105

7 0

3 years ago

1. Determine the following set of adjustments to the equation then draw the graph !!

suter [353]

Answer:

y = -1 and u = 3.333

Step-by-step explanation:

The given equations are :

3u + y = 9 ...(1)

3u-5y = 15 ...(2)

Subtract equation (2) from (1).

3u + y-( 3u-5y)= 9 -15

y+5y = -6

6y = -6

y = -1

Put the value of y in equation (1).

3u + (-1) = 9

3u-1 = 9

3u = 10

u = 10/3

u = 3.333

The attached figure shows the graph for the above equations.

4 0

3 years ago

What is 8.5 as a fraction?

Contact [7]

8.5 =8 $\frac{1}{2}$ = 17/2
So, answer is 17/2

7 0

3 years ago

Read 2 more answers

What is the range of this function?

Vedmedyk [2.9K]

Answer:

Step-by-step explanation:

6 0

2 years ago