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lana66690 [7]
3 years ago
11

WILL MARK BRAINLYLIST PLZZ HELP!!

Mathematics
2 answers:
inessss [21]3 years ago
8 0

Answer:

49

Step-by-step explanation:

Ber [7]3 years ago
6 0

Answer:

x = 49

Step-by-step explanation:

180-131=49

they are supplementary angles

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ANSWER QUICKLY PLEASE 2. Molecules in the air are moving with speeds based on the normal model.
raketka [301]

Answer:

(a). The mean speed is 760 m/s.

(b). The standard deviation for our normal model is 142.1 m/s.

(c). The unusual speed is 1127 m/s.

(d). The average molecule speed is 929.48 m/s.

Step-by-step explanation:

Given that,

Molecules in the air are moving with speeds based on the normal model.

Let x be the speed of the molecules.

(a). If half of the air molecules are moving faster than 760 m/s.

We can say speed of a molecules is normally distributed.

So, the mean, median and mode of this distribution is at least greater than 760 m/s.

(b). If exactly 95% of the molecules are moving with speeds between 475.8 m/s and 1044.2 m/s,

If the standard deviation is σ and the mean is μ,

We need to calculate the standard deviation for our normal model

Using empirical rule

\mu-2\sigma=475.8...(I)

\mu+2\sigma=1044.2....(II)

Put the value of μ in equation (I)

760-2\sigma=475.8

-\sigma=\dfrac{475.8-760}{2}

\sigma=142.1\ m/s

(c). One molecule is found to be moving with a speed of 1127 m/s.

We know that,

1127 is the between 1126 and 1128.

Since, it is a continuous distribution,

We need to find the probability that speed is between this

Using excel function

P(1126

P(1126

We know that,

Any probability less than 0.05 is considered as unusual

So, 0.0002<0.05

So, 1127 will be considered as the unusual speed.

(d). If the temperature increase caused the z-score of a particle moving at 1100 m/s particle to drop to 1.2 after the temperature increase.

We need to calculate the average molecule speed

Using formula of average molecule speed

z=\dfrac{x-\mu'}{\sigma}

-\mu'=z\sigma-x

Put the value in to the formula

-\mu'=1.2\times142.1-1100

\mu'=929.48\ m/s

Hence, (a). The mean speed is 760 m/s.

(b). The standard deviation for our normal model is 142.1 m/s.

(c). The unusual speed is 1127 m/s.

(d). The average molecule speed is 929.48 m/s.

8 0
3 years ago
The set of ordered pairs {(6,4),(2,-5),(-2,4)&lt;(6,-4)} is a function?
ankoles [38]

Answer:

Not a function

Step-by-step explanation:

There are two points in the set that have the same x-value or "input": (6,4) and (6,-4). This fails the vertical line test which means that one input will give two potential outputs. This cannot make a function.

8 0
3 years ago
What single decimal multiplier would you use to increase by 15% followed by a 17% decrease?
zloy xaker [14]

Answer:

1.3455

Step-by-step explanation:

A 15% increase is a multiplication by 1.15

So a 15% and a 17% increase is a multiplication of 1.15*1.17 = 1.3455

8 0
3 years ago
Read 2 more answers
Solve this equation with w​
Softa [21]

Step-by-step explanation:

Aaaaaaaaaaaaaaaaaaaaaaaaaa

7 0
3 years ago
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HELP PLEASE ASAP!!! CORRECT GETS BRAINLIEST!
ASHA 777 [7]

Answer:60

Step-by-step explanation:

5x4x3=60

6 0
3 years ago
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