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kifflom [539]
2 years ago
7

What is the value of the expression when n = 3? 12 24 42 54

Mathematics
2 answers:
11Alexandr11 [23.1K]2 years ago
7 0

Answer:

D

Step-by-step explanation:

what they said

8090 [49]2 years ago
4 0

Answer:

It's D

Step-by-step explanation:

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A physical fitness association is including the mile run in its secondary- school fitness test. the time for this event for boys
liberstina [14]

Answer:

<u>The probability that a randomly selected boy in school can run the mile in less than 348 seconds is 1.1%.</u>

Step-by-step explanation:

1. Let's review the information provided to us to answer the question correctly:

μ of the time a group of boys run the mile in its secondary- school fitness test  = 440 seconds

σ of the time a group of boys run the mile in its secondary- school fitness test = 40 seconds

2. Find the probability that a randomly selected boy in school can run the mile in less than 348 seconds.

Let's find out the z-score, this way:

z-score = (348 - 440)/40

z-score = -92/40 = -2.3

Now let's find out the probability of z-score = -2.3, using the table:

p (-2.3) = 0.0107

p (-2.3) = 0.0107 * 100

p (-2.3) = 1.1% (rounding to the next tenth)

<u>The probability that a randomly selected boy in school can run the mile in less than 348 seconds is 1.1%.</u>

4 0
2 years ago
Read 2 more answers
The axis of symmetry for the function f(x)=-2x^2+4x+1 is the line x=1 where it's the vertex of the function located
vodomira [7]
Vertex has the coordinate (1;3)

8 0
3 years ago
Read 2 more answers
One pound of ground beef is $3.09. How much is 4.5 pounds? Round to the nearest hundredth, if necessary.
olga55 [171]

Since 1 pound is $3.09, 4.5 pounds will be:

4.5*3.09=13.905

It says to round to nearest hundredth, so your answer is $13.91.

5 0
3 years ago
Read 2 more answers
Describe the end behavior of the function f(x)=-2x^4- x^3 +3.
Hoochie [10]

Answer:

B

Step-by-step explanation:

For a polynomial , the behaviour as x gets large is determined by the term of greatest degree,

f(x) = - 2x^{4} - x³ + 3

Is of even degree with a negative leading coefficient , then

f(x) → - ∞ as x → + ∞ and f(x) → - ∞ as x → - ∞

6 0
2 years ago
I don't really understand these because our teachers expect me to know this when she didn't teach us this.
stealth61 [152]
First, find the percentage of the price after the sale occures
percent = 100% - 20%
percent = 80%

We need to find the price for the pairs with the percentage above
new price = percentage of new price/percentage of old price × old price
new price = 80%/100% × 55
new price = 4/5 × 55
new price = 44
The new price is $44

Now we estimate how much the tax
tax = 6% × 44
tax = 6/100 × 44
tax = 2.64

Calculate how much Josie will pay
pay = new price + tax
pay = 44 + 2.64
pay = 46.64

Josie will pay $46.64
5 0
3 years ago
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