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3 years ago

REALLY EASY QUESTION TO TEST YOUR TRANSLATION SKILLS! WHO CAN ANSWER THE FASTEST?

Mathematics

1 answer:

dybincka [34]3 years ago

5 0

0,0 -1,-1. 1,-1. -1,1
I think......... I learned it last year-I think

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Based on FAA estimates the average age of the fleets of the 10 largest U.S. commercial passenger carriers is 13.4 years with a s

Aliun [14]

Answer : 0.0129

Step-by-step explanation:

Given : Based on FAA estimates the average age of the fleets of the 10 largest U.S. commercial passenger carriers is $\mu=13.4$ years and standard deviation is $\sigma=1.7$ years.

Sample size : $n=40$

Let X be the random variable that represents the age of fleets.

We assume that the ages of the fleets of the 10 largest U.S. commercial passenger carriers are normally distributed.

For z-score,

$z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

For x=14

$z=\dfrac{14-13.4}{\dfrac{1.7}{\sqrt{40}}}\approx2.23$

By using the standard normal distribution table , the probability that the average age of these 40 airplanes is at least 14 years old will be :-

$P(x\geq 14)=P(z\geq2.23)\\\\=1-P(z$

Hence, the required probability = 0.0129

6 0

2 years ago

Solve for x (picture is included below)

Anna11 [10]

Solve for x:

4x - 7 = 3

Add 7 to both sides

4x = 10

Divide both sides by 4

x = 10/4

Simplify:

x = 5/2

Answer for question 1: x = 5/2

13 + 2x/3 = 15

Multiply both sides by 3

39 + 2x = 45

Subtract 39 from both sides

2x = 6

Divide both sides by 2

x = 3

Answer for question 2: x = 3

10x + 7 = 15

Subtract 7 from both sides

10x = 8

Divide both sides by 10

x = 8/10

Simplify

x = 4/5

Answer for question 3: x = 4/5

8 0

2 years ago

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Pls pls help ASAP first correct answer gets brainleist

Leno4ka [110]

Answer:

12ch/a

Step-by-step explanation:

hope this helped!

3 0

1 year ago

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1/4 times a number is -12. one step equations

alexgriva [62]

Answer:

1/4x = -12

X=-48

8 0

2 years ago

Some plsssss helppp!!!!

Vitek1552 [10]

Answer:

Step-by-step explanation:

add the z's and make both sides of the equation equal

4 0

2 years ago

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