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Maksim231197 [3]

3 years ago

10

A population has a mean muμequals=5858 and a standard deviation sigmaσequals=4242. find the mean and standard deviation of a sam

pling distribution of sample means with sample size nequals=3131.

1 answer:

vova2212 [387]3 years ago

5 0

This one is a challenge

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6. Ava had a rough day on the stock market. Her stocks dropped in value to

Pani-rosa [81]

Answer:

420,000

Step-by-step explanation:

If 140,000 is $\frac{1}{3}$ of what she had yesterday, then you just multiply the number by 3 because $\frac{1}{3}$ times 3 is $\frac{3}{3}$ , which is 1.

6 0

3 years ago

Read 2 more answers

Help please!!<br> Solve for X.

Mekhanik [1.2K]

9514 1404 393

Answer:

3) x = 9

4) x = 3

Step-by-step explanation:

3) The two short segments are indicated as having a sum equal to the long segment.

(x +2) +(-5 +x) = 15

2x = 18 . . . . . . . . . . . . add 3

x = 9 . . . . . . . . . divide by 2

(This makes the segments be 9+2 = 11 and -5+9 = 4, which total 15.)

__

4) Same deal.

3x +3 = 4x

3 = x . . . . . . . . subtract 3x

(This makes the segments be 3(3) = 9 and 4(3) = 12, where 9+3=12.)

6 0

3 years ago

How many numbers are equal to the sum of two odd, one-digit numbers?

Dennis_Churaev [7]

Answer:

Seven numbers.

Step-by-step explanation:

Finding the numbers, which are equal to the sum of two odd number and it has to be single digit number.

Lets look into numbers which are odd and single digit.

1 = $1+3, 1+5, 1+7, 1+9$

∴ Sum of the number is $4,6,8\ and\ 10$

3 = $3+5, 3+7, 3+9$

∴ Sum of above number is $8,10\ and\ 12$

5 = $5+7, 5+9$

∴ Sum of above number is $12\ and\ 14$

7= $7+9$

∴ Sum of above number is $16$

Now, accumlating numbers which are fullfiling the criteria, however, making sure no number should get repeated.

∴ Numbers are: $4,6,8,10,12,14\ and\ 16$

Hence, there are total 7 numbers, which are equal to the sum of two odd, one-digit numbers.

4 0

4 years ago

After 8/15 of an hour, Jane has completed painting 3/5 of the wall. At this rate, how much of the wall will she finish painting

LuckyWell [14K]

Answer:

Step-by-step explanation:

Find the unit rate for this painting:

3/5 of wall surface 3/5 15 9

------------------------------- = --------------- * --------- = -----------

(8/15) hour 8/15 15 8

Jane could actually paint the whole wall plus 1/8 more of it in one hour.

5 0

3 years ago

Please HELPP!!! Solve the system of equations.<br> y= 2x<br> y= x^2 - 15

Nataly [62]

$y=2x\\y=x^2-15\\\\x^2-15=2x\\x^2-2x-15=0\\x^2-5x+3x-15=0\\x(x-5)+3(x-5)=0\\(x+3)(x-5)=0\\x=-3 \vee x=5\\\\y=2\cdot(-3) \vee y=2\cdot5\\y=-6 \vee y=10\\\\(x,y)\in\{(-3,-6),(5,10)\}$

7 0

3 years ago