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3 years ago

Assume the random variable X is normally distributed, with mean of 50 and a standard deviation of 9. Find the 9th percentile.

Mathematics

1 answer:

vovangra [49]3 years ago

7 0

Answer:

37.94

Step-by-step explanation:

the 9th percentile is equal to a zscore of -1.34

-1.34=(x-50)/9

x=37.94

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What is the value of the expression "two less than six times the difference of a number and five" when n = 9?

Burka [1]

Answer: The value of the expression when $n=9$ is $22$

Step-by-step explanation:

In this case, you need to remember that:

1. Tthe word "less than" indicates a subtraction.

2. By definition, the "Difference" in the result of a subtraction.

3. The word "times" indicates multiplication,

Based on the information given above, you know that " Six times the difference of a number and five" can be expressed as:

$6(n-5)$

Then, "Two less than six times the difference of a number and five" can be represented with this expression:

$6(n-5)-2$

Now you can substitute $n=9$ into the expression and the evaluate in order to find the value of the expression. This is:

$6(9-5)-2=6(4)-2=24-2=22$

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3 years ago

I NEED HELP ASAP What's 9+10

Hunter-Best [27]

Answer:

19 19 19 19

its 19

4 0

3 years ago

Read 2 more answers

Victor opens a savings account with $750. The account pays 6% interest, compounded every six months. If he makes no other deposi

Oksanka [162]

You would do 750 divided by 6% and that equals 125. So victor would deposit $125 after 18 months

6 0

3 years ago

The area of a rectangular room is 750 square feet. The width of the room is 5 feet less than the length of the room.

Gelneren [198K]

Answer:

B. y² – 5y = 750

C. 750 – y(y – 5) = 0

E. (y + 25)(y – 30) = 0

I'm assuming the 2 in the second option is supposed to be an exponent.

Step-by-step explanation:

Length = y

Width = y-5

Length × Width = Area

Area = y(y-5) = 750

Distribute.

y²-5y=750 (B is correct)

If you factor the equation above

(y + 25)(y – 30) = 0 (E is correct)

Area = y(y-5) = 750

Subtract y(y-5) from both sides.

750-y(y-5) = 0 (C is correct)

6 0

3 years ago

Urgent please please help It's due soon!

amm1812

9514 1404 393

Answer:

money market: $1000
stock: $238,500
mutual fund: $228,500

Step-by-step explanation:

We can let x and y represent the amounts invested in the stock and mutual fund, respectively. Then the amount invested in the money market account was (468000 -x -y). Two relations can be written.

x = y + 10000 . . . . . 10,000 more was invested in stock than in mutual funds

0.035(468000-x-y) +0.04(x) -0.03(y) = 2720 . . . . first-year return

Collecting terms in the second equation gives ...

0.005x -0.065y +16380 = 2720

-x + 13y = 2732000 . . . . . . subtract 16380, multiply by -200

12y -10000 = 2732000 . . . . substitute for x using the first equation

y = 2742000/12 = 228,500 . . . . solve for y

x = 228,500 +10,000 = 238,500 . . . . . find x from the first equation

468,000 -x -y = 468,000 -467,000 = 1,000 . . . . find the money market amount

Pierre invested $1000 in the money market account, $238,500 in the stock, and $228,500 in the mutual fund.

6 0

3 years ago

Assume the random variable X is normally​ distributed, with mean of 50 and a standard deviation of 9. Find the 9th percentile.

Assume the random variable X is normally distributed, with mean of 50 and a standard deviation of 9. Find the 9th percentile.