4 years ago

Enter what that means? Help someone.

Mathematics

1 answer:

Luda [366]4 years ago

7 0

$\frac{x^2}{3}$ is the same as $\frac{1}{3}x^2$

Dividing by 3 is the same as multiplying by the fraction 1/3

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A set of mathematics exam scores are normally distributed with a mean of 80.280.280, point, 2 points and a standard deviation of

hichkok12 [17]

Answer:

0.3745

Step-by-step explanation:

Data

mean ( $\mu$ ): 80

standard deviation ( $\sigma$ ): 4

Normal distribution table is in figure attached .

$Z = \frac{x - \mu}{\sigma
}$

Z = (85 - 80)/4 = 1.25

Area below curve = 0.3944

Z = (82 - 80)/4 = 0.5

Area below curve = 0.0199

Proportion of exam scores between 82 and 85?

0.3944 - 0.0199 = 0.3745

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3 years ago

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If two congruent angles are supplementary, what must be true of the two angles

klio [65]

Answer: They add up to 180 degrees

Step-by-step explanation:

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3 years ago

the number of people who came to the concert is 372 more than the value of 5 thousands. how many people came to the concert?

DENIUS [597]

372 more is also saying 372 +.

So, 5,000 + 372 = 5,372

5,372 people came to the concert.

4 0

4 years ago

Someone PLEASE help I am at 99!

Brums [2.3K]

12/80=3/20

Hope it helped
(Im in seventh grade too!)

6 0

3 years ago

The simplest form of the ratio 40 minutes to 6 hours is?

Kazeer [188]

Answer:

1:9

Step-by-step explanation:

6×60=360min

40:360

1:9

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3 years ago

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